Tracking reference signal availability indication

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configurations of a set of tracking reference signal (TRS) resource sets. The UE may receive an availability indication associated with one or more TRS resource sets from the set of TRS resource sets, and the availability indication is associated with one or more groups of TRS resource sets associated with the set of TRS resource sets. Numerous other aspects are described.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.17/805,599, filed Jun. 6, 2022, entitled “TRACKING REFERENCE SIGNALAVAILABILITY INDICATION,” which claims priority to U.S. ProvisionalPatent Application No. 63/263,410, filed on Nov. 2, 2021, entitled“TRACKING REFERENCE SIGNAL AVAILABILITY INDICATION,” the contents ofwhich are incorporated herein by reference in their entireties.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wirelesscommunication and to techniques and apparatuses for a tracking referencesignal (TRS) availability indication.

BACKGROUND

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency division multipleaccess (FDMA) systems, orthogonal frequency division multiple access(OFDMA) systems, single-carrier frequency division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless network may include one or more base stations that supportcommunication for a user equipment (UE) or multiple UEs. A UE maycommunicate with a base station via downlink communications and uplinkcommunications. “Downlink” (or “DL”) refers to a communication link fromthe base station to the UE, and “uplink” (or “UL”) refers to acommunication link from the UE to the base station.

The above multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent UEs to communicate on a municipal, national, regional, and/orglobal level. New Radio (NR), which may be referred to as 5G, is a setof enhancements to the LTE mobile standard promulgated by the 3GPP. NRis designed to better support mobile broadband internet access byimproving spectral efficiency, lowering costs, improving services,making use of new spectrum, and better integrating with other openstandards using orthogonal frequency division multiplexing (OFDM) with acyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/orsingle-carrier frequency division multiplexing (SC-FDM) (also known asdiscrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, aswell as supporting beamforming, multiple-input multiple-output (MIMO)antenna technology, and carrier aggregation. As the demand for mobilebroadband access continues to increase, further improvements in LTE, NR,and other radio access technologies remain useful.

SUMMARY

Some aspects described herein relate to a user equipment (UE) forwireless communication. The UE may include a memory and one or moreprocessors coupled to the memory. The one or more processors may beconfigured to receive configurations of a set of tracking referencesignal (TRS) resource sets. The one or more processors may be configuredto receive an availability indication associated with one or more TRSresource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.

Some aspects described herein relate to a base station for wirelesscommunication. The base station may include a memory and one or moreprocessors coupled to the memory. The one or more processors may beconfigured to transmit a configuration, intended for one or more UEs, ofa set of TRS resource sets. The one or more processors may be configuredto transmit an availability indication associated with one or more TRSresource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.

Some aspects described herein relate to a method of wirelesscommunication performed by a UE. The method may include receivingconfigurations of a set of TRS resource sets. The method may includereceiving an availability indication associated with one or more TRSresource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.

Some aspects described herein relate to a method of wirelesscommunication performed by a base station. The method may includetransmitting a configuration, intended for one or more UEs, of a set ofTRS resource sets. The method may include transmitting an availabilityindication associated with one or more TRS resource sets from the set ofTRS resource sets, wherein the availability indication indicates whetherTRS resource sets included in the one or more TRS resource sets are tobe transmitted, and wherein the availability indication is associatedwith one or more groups of TRS resource sets associated with the set ofTRS resource sets.

Some aspects described herein relate to a non-transitorycomputer-readable medium that stores a set of instructions for wirelesscommunication by a UE. The set of instructions, when executed by one ormore processors of the UE, may cause the UE to receive configurations ofa set of TRS resource sets. The set of instructions, when executed byone or more processors of the UE, may cause the UE to receive anavailability indication associated with one or more TRS resource setsfrom the set of TRS resource sets, wherein the availability indicationindicates whether TRS resource sets included in the one or more TRSresource sets are to be transmitted, and wherein the availabilityindication is associated with one or more groups of TRS resource setsassociated with the set of TRS resource sets.

Some aspects described herein relate to a non-transitorycomputer-readable medium that stores a set of instructions for wirelesscommunication by a base station. The set of instructions, when executedby one or more processors of the base station, may cause the basestation to transmit a configuration, intended for one or more UEs, of aset of TRS resource sets. The set of instructions, when executed by oneor more processors of the base station, may cause the base station totransmit an availability indication associated with one or more TRSresource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.

Some aspects described herein relate to an apparatus for wirelesscommunication. The apparatus may include means for receivingconfigurations of a set of TRS resource sets. The apparatus may includemeans for receiving an availability indication associated with one ormore TRS resource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.

Some aspects described herein relate to an apparatus for wirelesscommunication. The apparatus may include means for transmitting aconfiguration, intended for one or UEs, of a set of TRS resource sets.The apparatus may include means for transmitting an availabilityindication associated with one or more TRS resource sets from the set ofTRS resource sets, wherein the availability indication indicates whetherTRS resource sets included in the one or more TRS resource sets are tobe transmitted, and wherein the availability indication is associatedwith one or more groups of TRS resource sets associated with the set ofTRS resource sets.

Aspects generally include a method, apparatus, system, computer programproduct, non-transitory computer-readable medium, user equipment, basestation, network node, wireless communication device, and/or processingsystem as substantially described herein with reference to and asillustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages, will be betterunderstood from the following description when considered in connectionwith the accompanying figures. Each of the figures is provided for thepurposes of illustration and description, and not as a definition of thelimits of the claims.

While aspects are described in the present disclosure by illustration tosome examples, those skilled in the art will understand that suchaspects may be implemented in many different arrangements and scenarios.Techniques described herein may be implemented using different platformtypes, devices, systems, shapes, sizes, and/or packaging arrangements.For example, some aspects may be implemented via integrated chipembodiments or other non-module-component based devices (e.g., end-userdevices, vehicles, communication devices, computing devices, industrialequipment, retail/purchasing devices, medical devices, and/or artificialintelligence devices). Aspects may be implemented in chip-levelcomponents, modular components, non-modular components, non-chip-levelcomponents, device-level components, and/or system-level components.Devices incorporating described aspects and features may includeadditional components and features for implementation and practice ofclaimed and described aspects. For example, transmission and receptionof wireless signals may include one or more components for analog anddigital purposes (e.g., hardware components including antennas, radiofrequency (RF) chains, power amplifiers, modulators, buffers,processors, interleavers, adders, and/or summers). It is intended thataspects described herein may be practiced in a wide variety of devices,components, systems, distributed arrangements, and/or end-user devicesof varying size, shape, and constitution.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can beunderstood in detail, a more particular description, briefly summarizedabove, may be had by reference to aspects, some of which are illustratedin the appended drawings. It is to be noted, however, that the appendeddrawings illustrate only certain typical aspects of this disclosure andare therefore not to be considered limiting of its scope, for thedescription may admit to other equally effective aspects. The samereference numbers in different drawings may identify the same or similarelements.

FIG. 1 is a diagram illustrating an example of a wireless network, inaccordance with the present disclosure.

FIG. 2 is a diagram illustrating an example of a base station incommunication with a user equipment (UE) in a wireless network, inaccordance with the present disclosure.

FIG. 3 is a diagram illustrating an example of a synchronization signal(SS) hierarchy, in accordance with the present disclosure.

FIG. 4 is a diagram illustrating an example of physical channels andreference signals in a wireless network, in accordance with the presentdisclosure.

FIG. 5 is a diagram illustrating an example associated with trackingreference signal (TRS) availability indications, in accordance with thepresent disclosure.

FIG. 6 is a diagram illustrating examples associated with staggered TRSavailability indications, in accordance with the present disclosure.

FIGS. 7 and 8 are diagrams illustrating example processes associatedwith TRS availability indications, in accordance with the presentdisclosure.

FIGS. 9 and 10 are diagrams of example apparatuses for wirelesscommunication, in accordance with the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. One skilled in theart should appreciate that the scope of the disclosure is intended tocover any aspect of the disclosure disclosed herein, whether implementedindependently of or combined with any other aspect of the disclosure.For example, an apparatus may be implemented or a method may bepracticed using any number of the aspects set forth herein. In addition,the scope of the disclosure is intended to cover such an apparatus ormethod which is practiced using other structure, functionality, orstructure and functionality in addition to or other than the variousaspects of the disclosure set forth herein. It should be understood thatany aspect of the disclosure disclosed herein may be embodied by one ormore elements of a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, or the like(collectively referred to as “elements”). These elements may beimplemented using hardware, software, or combinations thereof. Whethersuch elements are implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem.

While aspects may be described herein using terminology commonlyassociated with a 5G or New Radio (NR) radio access technology (RAT),aspects of the present disclosure can be applied to other RATs, such asa 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

FIG. 1 is a diagram illustrating an example of a wireless network 100,in accordance with the present disclosure. The wireless network 100 maybe or may include elements of a 5G (e.g., NR) network and/or a 4G (e.g.,Long Term Evolution (LTE)) network, among other examples. The wirelessnetwork 100 may include one or more base stations 110 (shown as a BS 110a, a BS 110 b, a BS 110 c, and a BS 110 d), a user equipment (UE) 120 ormultiple UEs 120 (shown as a UE 120 a, a UE 120 b, a UE 120 c, a UE 120d, and a UE 120 e), and/or other network entities. A base station 110 isan entity that communicates with UEs 120. A base station 110 (sometimesreferred to as a BS) may include, for example, an NR base station, anLTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G),an access point, and/or a transmission reception point (TRP). Each basestation 110 may provide communication coverage for a particulargeographic area. In the Third Generation Partnership Project (3GPP), theterm “cell” can refer to a coverage area of a base station 110 and/or abase station subsystem serving this coverage area, depending on thecontext in which the term is used.

A base station 110 may provide communication coverage for a macro cell,a pico cell, a femto cell, and/or another type of cell. A macro cell maycover a relatively large geographic area (e.g., several kilometers inradius) and may allow unrestricted access by UEs 120 with servicesubscriptions. A pico cell may cover a relatively small geographic areaand may allow unrestricted access by UEs 120 with service subscription.A femto cell may cover a relatively small geographic area (e.g., a home)and may allow restricted access by UEs 120 having association with thefemto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A basestation 110 for a macro cell may be referred to as a macro base station.A base station 110 for a pico cell may be referred to as a pico basestation. A base station 110 for a femto cell may be referred to as afemto base station or an in-home base station. In the example shown inFIG. 1 , the BS 110 a may be a macro base station for a macro cell 102a, the BS 110 b may be a pico base station for a pico cell 102 b, andthe BS 110 c may be a femto base station for a femto cell 102 c. A basestation may support one or multiple (e.g., three) cells.

In some examples, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of a basestation 110 that is mobile (e.g., a mobile base station). In someexamples, the base stations 110 may be interconnected to one anotherand/or to one or more other base stations 110 or network nodes (notshown) in the wireless network 100 through various types of backhaulinterfaces, such as a direct physical connection or a virtual network,using any suitable transport network.

The wireless network 100 may include one or more relay stations. A relaystation is an entity that can receive a transmission of data from anupstream station (e.g., a base station 110 or a UE 120) and send atransmission of the data to a downstream station (e.g., a UE 120 or abase station 110). A relay station may be a UE 120 that can relaytransmissions for other UEs 120. In the example shown in FIG. 1 , the BS110 d (e.g., a relay base station) may communicate with the BS 110 a(e.g., a macro base station) and the UE 120 d in order to facilitatecommunication between the BS 110 a and the UE 120 d. A base station 110that relays communications may be referred to as a relay station, arelay base station, a relay, or the like.

The wireless network 100 may be a heterogeneous network that includesbase stations 110 of different types, such as macro base stations, picobase stations, femto base stations, relay base stations, or the like.These different types of base stations 110 may have different transmitpower levels, different coverage areas, and/or different impacts oninterference in the wireless network 100. For example, macro basestations may have a high transmit power level (e.g., 5 to 40 watts)whereas pico base stations, femto base stations, and relay base stationsmay have lower transmit power levels (e.g., 0.1 to 2 watts).

A network controller 130 may couple to or communicate with a set of basestations 110 and may provide coordination and control for these basestations 110. The network controller 130 may communicate with the basestations 110 via a backhaul communication link. The base stations 110may communicate with one another directly or indirectly via a wirelessor wireline backhaul communication link.

The UEs 120 may be dispersed throughout the wireless network 100, andeach UE 120 may be stationary or mobile. A UE 120 may include, forexample, an access terminal, a terminal, a mobile station, and/or asubscriber unit. A UE 120 may be a cellular phone (e.g., a smart phone),a personal digital assistant (PDA), a wireless modem, a wirelesscommunication device, a handheld device, a laptop computer, a cordlessphone, a wireless local loop (WLL) station, a tablet, a camera, a gamingdevice, a netbook, a smartbook, an ultrabook, a medical device, abiometric device, a wearable device (e.g., a smart watch, smartclothing, smart glasses, a smart wristband, smart jewelry (e.g., a smartring or a smart bracelet)), an entertainment device (e.g., a musicdevice, a video device, and/or a satellite radio), a vehicular componentor sensor, a smart meter/sensor, industrial manufacturing equipment, aglobal positioning system device, and/or any other suitable device thatis configured to communicate via a wireless medium.

Some UEs 120 may be considered machine-type communication (MTC) orevolved or enhanced machine-type communication (eMTC) UEs. An MTC UEand/or an eMTC UE may include, for example, a robot, a drone, a remotedevice, a sensor, a meter, a monitor, and/or a location tag, that maycommunicate with a base station, another device (e.g., a remote device),or some other entity. Some UEs 120 may be considered Internet-of-Things(IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT)devices. Some UEs 120 may be considered a Customer Premises Equipment. AUE 120 may be included inside a housing that houses components of the UE120, such as processor components and/or memory components. In someexamples, the processor components and the memory components may becoupled together. For example, the processor components (e.g., one ormore processors) and the memory components (e.g., a memory) may beoperatively coupled, communicatively coupled, electronically coupled,and/or electrically coupled.

In general, any number of wireless networks 100 may be deployed in agiven geographic area. Each wireless network 100 may support aparticular RAT and may operate on one or more frequencies. A RAT may bereferred to as a radio technology, an air interface, or the like. Afrequency may be referred to as a carrier, a frequency channel, or thelike. Each frequency may support a single RAT in a given geographic areain order to avoid interference between wireless networks of differentRATs. In some cases, NR or 5G RAT networks may be deployed.

In some examples, two or more UEs 120 (e.g., shown as UE 120 a and UE120 e) may communicate directly using one or more sidelink channels(e.g., without using a base station 110 as an intermediary tocommunicate with one another). For example, the UEs 120 may communicateusing peer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure(V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and/or amesh network. In such examples, a UE 120 may perform schedulingoperations, resource selection operations, and/or other operationsdescribed elsewhere herein as being performed by the base station 110.

Devices of the wireless network 100 may communicate using theelectromagnetic spectrum, which may be subdivided by frequency orwavelength into various classes, bands, channels, or the like. Forexample, devices of the wireless network 100 may communicate using oneor more operating bands. In 5G NR, two initial operating bands have beenidentified as frequency range designations FR1 (410 MHz-7.125 GHz) andFR2 (24.25 GHz-52.6 GHz). It should be understood that although aportion of FR1 is greater than 6 GHz, FR1 is often referred to(interchangeably) as a “Sub-6 GHz” band in various documents andarticles. A similar nomenclature issue sometimes occurs with regard toFR2, which is often referred to (interchangeably) as a “millimeter wave”band in documents and articles, despite being different from theextremely high frequency (EHF) band (30 GHz-300 GHz) which is identifiedby the International Telecommunications Union (ITU) as a “millimeterwave” band.

The frequencies between FR1 and FR2 are often referred to as mid-bandfrequencies. Recent 5G NR studies have identified an operating band forthese mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25 GHz). Frequency bands falling within FR3 may inherit FR1characteristics and/or FR2 characteristics, and thus may effectivelyextend features of FR1 and/or FR2 into mid-band frequencies. Inaddition, higher frequency bands are currently being explored to extend5G NR operation beyond 52.6 GHz. For example, three higher operatingbands have been identified as frequency range designations FR4a or FR4-1(52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

With the above examples in mind, unless specifically stated otherwise,it should be understood that the term “sub-6 GHz” or the like, if usedherein, may broadly represent frequencies that may be less than 6 GHz,may be within FR1, or may include mid-band frequencies. Further, unlessspecifically stated otherwise, it should be understood that the term“millimeter wave” or the like, if used herein, may broadly representfrequencies that may include mid-band frequencies, may be within FR2,FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band. It iscontemplated that the frequencies included in these operating bands(e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and/or FR5) may be modified,and techniques described herein are applicable to those modifiedfrequency ranges.

In some aspects, the term “base station” (e.g., the base station 110) or“network node” or “network entity” may refer to an aggregated basestation, a disaggregated base station (e.g., described in connectionwith FIG. 9 ), an integrated access and backhaul (IAB) node, a relaynode, and/or one or more components thereof. For example, in someaspects, “base station,” “network node,” or “network entity” may referto a central unit (CU), a distributed unit (DU), a radio unit (RU), aNear-Real Time (Near-RT) RAN Intelligent Controller (MC), or a Non-RealTime (Non-RT) MC, or a combination thereof. In some aspects, the term“base station,” “network node,” or “network entity” may refer to onedevice configured to perform one or more functions, such as thosedescribed herein in connection with the base station 110. In someaspects, the term “base station,” “network node,” or “network entity”may refer to a plurality of devices configured to perform the one ormore functions. For example, in some distributed systems, each of anumber of different devices (which may be located in the same geographiclocation or in different geographic locations) may be configured toperform at least a portion of a function, or to duplicate performance ofat least a portion of the function, and the term “base station,”“network node,” or “network entity” may refer to any one or more ofthose different devices. In some aspects, the term “base station,”“network node,” or “network entity” may refer to one or more virtualbase stations and/or one or more virtual base station functions. Forexample, in some aspects, two or more base station functions may beinstantiated on a single device. In some aspects, the term “basestation,” “network node,” or “network entity” may refer to one of thebase station functions and not another. In this way, a single device mayinclude more than one base station.

In some aspects, the UE 120 may include a communication manager 140. Asdescribed in more detail elsewhere herein, the communication manager 140may receive configurations of a set of tracking reference signal (TRS)resource sets; and receive an availability indication associated withone or more TRS resource sets from the set of TRS resource sets, wherethe availability indication indicates whether TRS resource sets includedin the one or more TRS resource sets are to be transmitted, and wherethe availability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.Additionally, or alternatively, the communication manager 140 mayperform one or more other operations described herein.

In some aspects, the base station 110 may include a communicationmanager 150. As described in more detail elsewhere herein, thecommunication manager 150 may transmit configurations of a set of TRSresource sets; and transmit an availability indication associated withone or more TRS resource sets from the set of TRS resource sets, wherethe availability indication indicates whether TRS resource sets includedin the one or more TRS resource sets are to be transmitted, and wherethe availability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets.Additionally, or alternatively, the communication manager 150 mayperform one or more other operations described herein.

As indicated above, FIG. 1 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 1 .

FIG. 2 is a diagram illustrating an example 200 of a base station 110 incommunication with a UE 120 in a wireless network 100, in accordancewith the present disclosure. The base station 110 may be equipped with aset of antennas 234 a through 234 t, such as T antennas (T≥1). The UE120 may be equipped with a set of antennas 252 a through 252 r, such asR antennas (R≥1).

At the base station 110, a transmit processor 220 may receive data, froma data source 212, intended for the UE 120 (or a set of UEs 120). Thetransmit processor 220 may select one or more modulation and codingschemes (MCSs) for the UE 120 based at least in part on one or morechannel quality indicators (CQIs) received from that UE 120. The basestation 110 may process (e.g., encode and modulate) the data for the UE120 based at least in part on the MCS(s) selected for the UE 120 and mayprovide data symbols for the UE 120. The transmit processor 220 mayprocess system information (e.g., for semi-static resource partitioninginformation (SRPI)) and control information (e.g., CQI requests, grants,and/or upper layer signaling) and provide overhead symbols and controlsymbols. The transmit processor 220 may generate reference symbols forreference signals (e.g., a cell-specific reference signal (CRS) or ademodulation reference signal (DMRS)) and synchronization signals (e.g.,a primary synchronization signal (PSS) or a secondary synchronizationsignal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO)processor 230 may perform spatial processing (e.g., precoding) on thedata symbols, the control symbols, the overhead symbols, and/or thereference symbols, if applicable, and may provide a set of output symbolstreams (e.g., T output symbol streams) to a corresponding set of modems232 (e.g., T modems), shown as modems 232 a through 232 t. For example,each output symbol stream may be provided to a modulator component(shown as MOD) of a modem 232. Each modem 232 may use a respectivemodulator component to process a respective output symbol stream (e.g.,for OFDM) to obtain an output sample stream. Each modem 232 may furtheruse a respective modulator component to process (e.g., convert toanalog, amplify, filter, and/or upconvert) the output sample stream toobtain a downlink signal. The modems 232 a through 232 t may transmit aset of downlink signals (e.g., T downlink signals) via a correspondingset of antennas 234 (e.g., T antennas), shown as antennas 234 a through234 t.

At the UE 120, a set of antennas 252 (shown as antennas 252 a through252 r) may receive the downlink signals from the base station 110 and/orother base stations 110 and may provide a set of received signals (e.g.,R received signals) to a set of modems 254 (e.g., R modems), shown asmodems 254 a through 254 r. For example, each received signal may beprovided to a demodulator component (shown as DEMOD) of a modem 254.Each modem 254 may use a respective demodulator component to condition(e.g., filter, amplify, downconvert, and/or digitize) a received signalto obtain input samples. Each modem 254 may use a demodulator componentto further process the input samples (e.g., for OFDM) to obtain receivedsymbols. A MIMO detector 256 may obtain received symbols from the modems254, may perform MIMO detection on the received symbols if applicable,and may provide detected symbols. A receive processor 258 may process(e.g., demodulate and decode) the detected symbols, may provide decodeddata for the UE 120 to a data sink 260, and may provide decoded controlinformation and system information to a controller/processor 280. Theterm “controller/processor” may refer to one or more controllers, one ormore processors, or a combination thereof. A channel processor maydetermine a reference signal received power (RSRP) parameter, a receivedsignal strength indicator (RSSI) parameter, a reference signal receivedquality (RSRQ) parameter, and/or a CQI parameter, among other examples.In some examples, one or more components of the UE 120 may be includedin a housing 284.

The network controller 130 may include a communication unit 294, acontroller/processor 290, and a memory 292. The network controller 130may include, for example, one or more devices in a core network. Thenetwork controller 130 may communicate with the base station 110 via thecommunication unit 294.

One or more antennas (e.g., antennas 234 a through 234 t and/or antennas252 a through 252 r) may include, or may be included within, one or moreantenna panels, one or more antenna groups, one or more sets of antennaelements, and/or one or more antenna arrays, among other examples. Anantenna panel, an antenna group, a set of antenna elements, and/or anantenna array may include one or more antenna elements (within a singlehousing or multiple housings), a set of coplanar antenna elements, a setof non-coplanar antenna elements, and/or one or more antenna elementscoupled to one or more transmission and/or reception components, such asone or more components of FIG. 2 .

On the uplink, at the UE 120, a transmit processor 264 may receive andprocess data from a data source 262 and control information (e.g., forreports that include RSRP, RSSI, RSRQ, and/or CQI) from thecontroller/processor 280. The transmit processor 264 may generatereference symbols for one or more reference signals. The symbols fromthe transmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by the modems 254 (e.g., for DFT-s-OFDM orCP-OFDM), and transmitted to the base station 110. In some examples, themodem 254 of the UE 120 may include a modulator and a demodulator. Insome examples, the UE 120 includes a transceiver. The transceiver mayinclude any combination of the antenna(s) 252, the modem(s) 254, theMIMO detector 256, the receive processor 258, the transmit processor264, and/or the TX MIMO processor 266. The transceiver may be used by aprocessor (e.g., the controller/processor 280) and the memory 282 toperform aspects of any of the methods described herein (e.g., withreference to FIGS. 5-10 ).

At the base station 110, the uplink signals from UE 120 and/or other UEsmay be received by the antennas 234, processed by the modem 232 (e.g., ademodulator component, shown as DEMOD, of the modem 232), detected by aMIMO detector 236 if applicable, and further processed by a receiveprocessor 238 to obtain decoded data and control information sent by theUE 120. The receive processor 238 may provide the decoded data to a datasink 239 and provide the decoded control information to thecontroller/processor 240. The base station 110 may include acommunication unit 244 and may communicate with the network controller130 via the communication unit 244. The base station 110 may include ascheduler 246 to schedule one or more UEs 120 for downlink and/or uplinkcommunications. In some examples, the modem 232 of the base station 110may include a modulator and a demodulator. In some examples, the basestation 110 includes a transceiver. The transceiver may include anycombination of the antenna(s) 234, the modem(s) 232, the MIMO detector236, the receive processor 238, the transmit processor 220, and/or theTX MIMO processor 230. The transceiver may be used by a processor (e.g.,the controller/processor 240) and the memory 242 to perform aspects ofany of the methods described herein (e.g., with reference to FIGS. 5-10).

The controller/processor 240 of the base station 110, thecontroller/processor 280 of the UE 120, and/or any other component(s) ofFIG. 2 may perform one or more techniques associated with a TRSavailability indication, as described in more detail elsewhere herein.For example, the controller/processor 240 of the base station 110, thecontroller/processor 280 of the UE 120, and/or any other component(s) ofFIG. 2 may perform or direct operations of, for example, process 700 ofFIG. 7 , process 800 of FIG. 8 , and/or other processes as describedherein. The memory 242 and the memory 282 may store data and programcodes for the base station 110 and the UE 120, respectively. In someexamples, the memory 242 and/or the memory 282 may include anon-transitory computer-readable medium storing one or more instructions(e.g., code and/or program code) for wireless communication. Forexample, the one or more instructions, when executed (e.g., directly, orafter compiling, converting, and/or interpreting) by one or moreprocessors of the base station 110 and/or the UE 120, may cause the oneor more processors, the UE 120, and/or the base station 110 to performor direct operations of, for example, process 700 of FIG. 7 , process800 of FIG. 8 , and/or other processes as described herein. In someexamples, executing instructions may include running the instructions,converting the instructions, compiling the instructions, and/orinterpreting the instructions, among other examples.

In some aspects, the UE 120 includes means for receiving configurationsof a set of TRS resource sets; and/or means for receiving anavailability indication associated with one or more TRS resource setsfrom the set of TRS resource sets, wherein the availability indicationindicates whether TRS resource sets included in the one or more TRSresource sets are to be transmitted, and wherein the availabilityindication is associated with one or more groups of TRS resource setsassociated with the set of TRS resource sets. The means for the UE 120to perform operations described herein may include, for example, one ormore of communication manager 140, antenna 252, modem 254, MIMO detector256, receive processor 258, transmit processor 264, TX MIMO processor266, controller/processor 280, or memory 282.

In some aspects, the base station 110 includes means for transmittingconfigurations of a set of TRS resource sets; and/or means fortransmitting an availability indication associated with one or more TRSresource sets from the set of TRS resource sets, wherein theavailability indication indicates whether TRS resource sets included inthe one or more TRS resource sets are to be transmitted, and wherein theavailability indication is associated with one or more groups of TRSresource sets associated with the set of TRS resource sets. The meansfor the base station to perform operations described herein may include,for example, one or more of communication manager 150, transmitprocessor 220, TX MIMO processor 230, modem 232, antenna 234, MIMOdetector 236, receive processor 238, controller/processor 240, memory242, or scheduler 246.

While blocks in FIG. 2 are illustrated as distinct components, thefunctions described above with respect to the blocks may be implementedin a single hardware, software, or combination component or in variouscombinations of components. For example, the functions described withrespect to the transmit processor 264, the receive processor 258, and/orthe TX MIMO processor 266 may be performed by or under the control ofthe controller/processor 280.

As indicated above, FIG. 2 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 2 .

Deployment of communication systems, such as 5G NR systems, may bearranged in multiple manners with various components or constituentparts. In a 5G NR system, or network, a network node, a network entity,a mobility element of a network, a radio access network (RAN) node, acore network node, a network element, a base station, or a networkequipment may be implemented in an aggregated or disaggregatedarchitecture. For example, a base station (such as a Node B (NB),evolved NB (eNB), NR base station (BS), 5G NB, gNodeB (gNB), accesspoint (AP), TRP, or cell), or one or more units (or one or morecomponents) performing base station functionality, may be implemented asan aggregated base station (also known as a standalone base station or amonolithic base station) or a disaggregated base station. “Networkentity” or “network node” may refer to a disaggregated base station, orto one or more units of a disaggregated base station (such as one ormore CUs, one or more DUs, one or more RUs, or a combination thereof).

An aggregated base station may be configured to utilize a radio protocolstack that is physically or logically integrated within a single RANnode (for example, within a single device or unit). A disaggregated basestation may be configured to utilize a protocol stack that is physicallyor logically distributed among two or more units (such as one or moreCUs, one or more DUs, or one or more RUs). In some aspects, a CU may beimplemented within a RAN node, and one or more DUs may be co-locatedwith the CU, or alternatively, may be geographically or virtuallydistributed throughout one or multiple other RAN nodes. The DUs may beimplemented to communicate with one or more RUs. Each of the CU, DU, andRU also may be implemented as virtual units (e.g., a virtual centralunit (VCU), a virtual distributed unit (VDU), or a virtual radio unit(VRU)).

Base station-type operation or network design may consider aggregationcharacteristics of base station functionality. For example,disaggregated base stations may be utilized in an IAB network, an openradio access network O-RAN (such as the network configuration sponsoredby the O-RAN Alliance)), or a virtualized radio access network (vRAN,also known as a cloud radio access network (C-RAN)) to facilitatescaling of communication systems by separating base stationfunctionality into one or more units that may be individually deployed.A disaggregated base station may include functionality implementedacross two or more units at various physical locations, as well asfunctionality implemented for at least one unit virtually, which mayenable flexibility in network design. The various units of thedisaggregated base station may be configured for wired or wirelesscommunication with at least one other unit of the disaggregated basestation.

FIG. 3 is a diagram illustrating an example 300 of a synchronizationsignal (SS) hierarchy, in accordance with the present disclosure. Asshown in FIG. 3 , the SS hierarchy may include an SS burst set 305,which may include multiple SS bursts 310, shown as SS burst 0 through SSburst N−1, where Nis a maximum number of repetitions of the SS burst 310that may be transmitted by the base station. As further shown, each SSburst 310 may include one or more SS blocks (SSBs) 315, shown as SSB 0through SSB M−1, where M is a maximum number of SSBs 315 that can becarried by an SS burst 310. In some examples, different SSBs 315 may bebeam-formed differently (e.g., transmitted using different beams), andmay be used for cell search, cell acquisition, beam management, and/orbeam selection (e.g., as part of an initial network access procedure).An SS burst set 305 may be periodically transmitted by a wireless node(e.g., base station 110), such as every X milliseconds, as shown in FIG.3 . In some examples, an SS burst set 305 may have a fixed or dynamiclength, shown as Y milliseconds in FIG. 3 . In some cases, an SS burstset 305 or an SS burst 310 may be referred to as a discovery referencesignal (DRS) transmission window or an SSB measurement timeconfiguration (SMTC) window.

In some examples, an SSB 315 may include resources that carry a PSS 320,an SSS 325, and/or a physical broadcast channel (PBCH) 330. In someexamples, multiple SSBs 315 are included in an SS burst 310 (e.g., withtransmission on different beams), and the PSS 320, the SSS 325, and/orthe PBCH 330 may be the same across each SSB 315 of the SS burst 310. Insome examples, a single SSB 315 may be included in an SS burst 310. Insome examples, the SSB 315 may be at least four symbols (e.g., OFDMsymbols) in length, where each symbol carries one or more of the PSS 320(e.g., occupying one symbol), the SSS 325 (e.g., occupying one symbol),and/or the PBCH 330 (e.g., occupying two symbols). In some examples, anSSB 315 may be referred to as an SS/PBCH block.

In some examples, the symbols of an SSB 315 are consecutive, as shown inFIG. 3 . In some examples, the symbols of an SSB 315 arenon-consecutive. Similarly, in some examples, one or more SSBs 315 ofthe SS burst 310 may be transmitted in consecutive radio resources(e.g., consecutive symbols) during one or more slots. Additionally, oralternatively, one or more SSBs 315 of the SS burst 310 may betransmitted in non-consecutive radio resources.

In some examples, the SS bursts 310 may have a burst period, and theSSBs 315 of the SS burst 310 may be transmitted by a wireless node(e.g., base station 110) according to the burst period. In this case,the SSBs 315 may be repeated during each SS burst 310. In some examples,the SS burst set 305 may have a burst set periodicity, whereby the SSbursts 310 of the SS burst set 305 are transmitted by the wireless nodeaccording to the fixed burst set periodicity. In other words, the SSbursts 310 may be repeated during each SS burst set 305.

In some examples, an SSB 315 may include an SSB index, which maycorrespond to a beam used to carry the SSB 315. A UE 120 may monitor forand/or measure SSBs 315 using different receive (Rx) beams during aninitial network access procedure and/or a cell search procedure, amongother examples. Based at least in part on the monitoring and/ormeasuring, the UE 120 may indicate one or more SSBs 315 with a bestsignal parameter (e.g., an RSRP parameter) to a base station 110. Thebase station 110 and the UE 120 may use the one or more indicated SSBs315 to select one or more beams to be used for communication between thebase station 110 and the UE 120 (e.g., for a random access channel(RACH) procedure). Additionally, or alternatively, the UE 120 may usethe SSB 315 and/or the SSB index to determine a cell timing for a cellvia which the SSB 315 is received (e.g., a serving cell).

Beamforming may be used for communications between a UE and a basestation, such as for millimeter wave communications and/or the like. Insuch a case, the base station may provide the UE with a configuration oftransmission configuration indicator (TCI) states that respectivelyindicate beams that may be used by the UE, such as for receiving aphysical downlink shared channel (PDSCH). The base station may indicatean activated TCI state to the UE, which the UE may use to select a beamfor receiving the PDSCH.

A beam indication may be, or include, a TCI state information element, abeam identifier (ID), spatial relation information, a TCI state ID, aclosed loop index, a panel ID, a TRP ID, and/or a sounding referencesignal (SRS) set ID, among other examples. A TCI state informationelement (referred to as a TCI state herein) may indicate informationassociated with a beam such as a downlink beam. For example, the TCIstate information element may indicate a TCI state identification (e.g.,a tci-StateID), a quasi-co-location (QCL) type (e.g., a qcl-Type1,qcl-Type2, qcl-TypeA, qcl-TypeB, qcl-TypeC, qcl-TypeD, and/or the like),a cell identification (e.g., a ServCellIndex), a bandwidth partidentification (bwp-Id), a reference signal identification such as achannel state information (CSI) reference signal (CSI-RS) (e.g., anNZP-CSI-RS-ResourceId, an SSB-Index, and/or the like), and/or the like.Spatial relation information may similarly indicate informationassociated with an uplink beam.

For example, an SSB beam (e.g., an SSB index) may serve as a QCL sourcereference signal for one or more other signals, such as a CSI-RS, a TRS,and/or other signals. For example, a UE may use an SSB beam (e.g., anSSB index) to obtain QCL information that is used by the UE to receive aTRS. In other words, a TRS may be transmitted (e.g., by the basestation) using a same beam as the SSB, and the UE may use the SSB toobtain QCL information to be used to receive the TRS.

As indicated above, FIG. 3 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 3 .

FIG. 4 is a diagram illustrating an example 400 of physical channels andreference signals in a wireless network, in accordance with the presentdisclosure. As shown in FIG. 4 , downlink channels and downlinkreference signals may carry information from a base station 110 to a UE120, and uplink channels and uplink reference signals may carryinformation from a UE 120 to a base station 110.

As shown, a downlink channel may include a physical downlink controlchannel (PDCCH) that carries downlink control information (DCI), a PDSCHthat carries downlink data, or a PBCH that carries system information,among other examples. In some examples, PDSCH communications may bescheduled by PDCCH communications. As further shown, an uplink channelmay include a physical uplink control channel (PUCCH) that carriesuplink control information (UCI), a physical uplink shared channel(PUSCH) that carries uplink data, or a physical random access channel(PRACH) used for initial network access, among other examples. In someexamples, the UE 120 may transmit acknowledgement (ACK) or negativeacknowledgement (NACK) feedback (e.g., ACK/NACK feedback or ACK/NACKinformation) in UCI on the PUCCH and/or the PUSCH.

As further shown, a downlink reference signal may include an SSB, aCSI-RS, a DMRS, a positioning reference signal (PRS), a phase trackingreference signal (PTRS), and/or a TRS, among other examples. As alsoshown, an uplink reference signal may include an SRS, a DMRS, or a PTRS,among other examples.

An SSB may carry information used for initial network acquisition andsynchronization, such as a PSS, an SSS, a PBCH, and a PBCH DMRS. An SSBis sometimes referred to as a synchronization signal/PBCH (SS/PBCH)block. In some examples, the base station 110 may transmit multiple SSBson multiple corresponding beams, and the SSBs may be used for beamselection.

A CSI-RS may carry information used for downlink channel estimation(e.g., downlink CSI acquisition), which may be used for scheduling, linkadaptation, or beam management, among other examples. The base station110 may configure a set of CSI-RSs for the UE 120, and the UE 120 maymeasure the configured set of CSI-RSs. Based at least in part on themeasurements, the UE 120 may perform channel estimation and may reportchannel estimation parameters to the base station 110 (e.g., in a CSIreport), such as a CQI, a precoding matrix indicator (PMI), a CSI-RSresource indicator (CRI), a layer indicator (LI), a rank indicator (RI),or an RSRP, among other examples. The base station 110 may use the CSIreport to select transmission parameters for downlink communications tothe UE 120, such as a number of transmission layers (e.g., a rank), aprecoding matrix (e.g., a precoder), an MCS, or a refined downlink beam(e.g., using a beam refinement procedure or a beam managementprocedure), among other examples.

A DMRS may carry information used to estimate a radio channel fordemodulation of an associated physical channel (e.g., PDCCH, PDSCH,PBCH, PUCCH, or PUSCH). The design and mapping of a DMRS may be specificto a physical channel for which the DMRS is used for estimation. DMRSsare UE-specific, can be beamformed, can be confined in a scheduledresource (e.g., rather than transmitted on a wideband), and can betransmitted only when necessary. As shown, DMRSs are used for bothdownlink communications and uplink communications.

A PTRS may carry information used to compensate for oscillator phasenoise. Typically, the phase noise increases as the oscillator carrierfrequency increases. Thus, PTRS can be utilized at high carrierfrequencies, such as millimeter wave frequencies, to mitigate phasenoise. The PTRS may be used to track the phase of the local oscillatorand to enable suppression of phase noise and common phase error (CPE).As shown, PTRSs are used for both downlink communications (e.g., on thePDSCH) and uplink communications (e.g., on the PUSCH).

A PRS may carry information used to enable timing or rangingmeasurements of the UE 120 based on signals transmitted by the basestation 110 to improve observed time difference of arrival (OTDOA)positioning performance. For example, a PRS may be a pseudo-randomQuadrature Phase Shift Keying (QPSK) sequence mapped in diagonalpatterns with shifts in frequency and time to avoid collision withcell-specific reference signals and control channels (e.g., a PDCCH). Ingeneral, a PRS may be designed to improve detectability by the UE 120,which may need to detect downlink signals from multiple neighboring basestations in order to perform OTDOA-based positioning. Accordingly, theUE 120 may receive a PRS from multiple cells (e.g., a reference cell andone or more neighbor cells), and may report a reference signal timedifference (RSTD) based on OTDOA measurements associated with the PRSsreceived from the multiple cells. In some examples, the base station 110may then calculate a position of the UE 120 based on the RSTDmeasurements reported by the UE 120.

An SRS may carry information used for uplink channel estimation, whichmay be used for scheduling, link adaptation, precoder selection, or beammanagement, among other examples. The base station 110 may configure oneor more SRS resource sets for the UE 120, and the UE 120 may transmitSRSs on the configured SRS resource sets. An SRS resource set may have aconfigured usage, such as uplink CSI acquisition, downlink CSIacquisition for reciprocity-based operations, uplink beam management,among other examples. The base station 110 may measure the SRSs, mayperform channel estimation based at least in part on the measurements,and may use the SRS measurements to configure communications with the UE120.

A TRS is a downlink signal that may be used to perform timesynchronization or frequency synchronization with an area, or to performother tracking in order to receive communications in the area. The UEmay receive the TRS and may compare the resources on which the TRS isreceived to resources on which the TRS was expected to be received toperform time and frequency synchronization and tracking. For example, aUE may use the TRS to update a tracking loop, which tracks changes to aframe timing of the network and an estimated time of arrival (TOA) ofsignals to be received by the UE. The UE may use the tracking loopupdated by TRSs to perform operations quickly when transitioning from anidle or inactive state to a connected state. The base station mayutilize the TRS to communicate with the UE. The base station maytransmit a radio resource control (RRC) message to a connected UE (e.g.,a UE operating in an RRC state of RRC_CONNECTED). The RRC message mayinclude configuration information for the TRS, or a TRS configuration.The UE may receive the RRC message and may store the TRS configuration.The UE may perform an action causing phase discontinuity, such asbandwidth part (BWP) switching, BWP activation, carrier aggregation,cell activation (e.g., secondary cell activation), multi-TRP switching,multi-panel switching, and/or beam changing, among other examples, wherethe UE uses the TRS for fast synchronization and fine time/frequencytracking. In some examples, the UE may use a TRS for automatic gaincontrol (AGC) operations.

As indicated above, FIG. 4 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 4 .

A UE may be configured to operate in one of at least three RRC states.For example, a UE may operate in a connected state (e.g., anRRC_CONNECTED) mode where the UE is connected to the wireless network(e.g., in both the control and user planes) through the base station.That is, a UE in an RRC connected mode may have an access stratum (AS)context stored in the RAN, the UE may belong to a specific cell, the UEmay communicate unicast data, and the RAN may control mobility of theUE. In an inactive state (e.g., an RRC_INACTIVE mode), the UE may havean RRC context established with the base station or a core networkconnection established, but no data transfer is possible from the UE.The UE may still be able to receive paging initiated by the RAN andreceive a broadcast of system information. In an idle state (e.g., anRRC_IDLE mode), where RRC context and base station or core networkconnections are not established, no data transfer is possible from theUE. The UE may still be able to receive a broadcast of systeminformation when operating in the RRC idle mode.

A TRS may be configured to help a UE save power. In some examples, oneor more TRS resources and/or one or more TRS resource sets may beconfigured for the UE. As used herein, “TRS resource” refers to a set oftime domain resources and/or frequency domain resources in which a TRSmay be transmitted by the base station. For example, a TRS resource maybe associated with a QCL reference (e.g., an SSB index), a time domainresource allocation, and/or a frequency domain resource allocation,among other examples. As used herein, “TRS resource set” may refer toone or more TRS resources that are associated with one or more commonconfiguration parameters (e.g., the TRS resources may all be associatedwith the one or more common configuration parameters). For example, TRSresources included in a TRS resource set may be associated with a commonQCL reference (e.g., a common SSB index), a common time domain startinglocation (e.g., a common first OFDM symbol in the time domain), a commonfrequency domain resource allocation, a common starting resource block(RB), a common number of RBs, one or more common power controlparameters, and/or a common periodicity and offset, among otherexamples. For example, a common QCL reference (e.g., a common SSB indexor a common SSB beam) may be configured for each TRS resource set, suchthat each TRS resource included in the TRS resource set uses the sameQCL reference. Configuring TRS resource sets may reduce a configurationsignaling overhead that would have otherwise been used to separatelyconfigure each TRS resource included in the TRS resource set.

In some cases, UEs operating in an idle state or an inactive state mayuse SSBs transmitted by a base station for radio resource management(RRM) measurements, to update a tracking loop, and/or to perform AGCoperations, among other examples. However, SSB transmissions by the basestation may be sparse (e.g., SSBs may be transmitted by the base stationwith a relatively large periodicity). Therefore, in some cases, a basestation may transmit a TRS to a UE when the UE is in an idle or inactivestate to supplement the SSBs for RRM measurements, tacking loop updates,and/or AGC operations, among other examples. The TRS configurationinformation received by the UE may indicate the resources on which thebase station may transmit the TRS. For example, a UE operating in anidle state or an inactive state may use a TRS transmitted by the basestation for RRM measurements, tacking loop updates, and/or AGCoperations, among other examples.

However, a TRS may not be a dedicated resource for UEs operating in anidle state or an inactive state. In other words, TRSs received and/ormeasured by the UEs operating in an idle state or an inactive state maynot be specifically configured for those UEs. For example, the network(e.g., the base station) may configure TRS resources and/or TRSresources based at least in part on UEs operating in a connected state(e.g., based at least in part on UEs that are communicating with thebase station in the connected state). In other words, if no UEs that areoperating in a connected mode require a TRS to be transmitted by thebase station, then the base station may not transmit any TRSs.

The base station may indicate configuration information for TRSs in abroadcast signal, such as a system information block (SIB), to enableUEs operating in an idle state or an inactive state to use the TRSs(e.g., indicated by the configuration information) for RRM measurements,tacking loop updates, and/or AGC operations, among other examples. Asdescribed above, the network (e.g., the base station) may dynamicallydetermine whether to transmit configured TRSs. However, theconfiguration of TRSs may be a static configuration (e.g., may beindicated in system information or a SIB). Therefore, dynamicallyupdating the configuration information to indicate TRSs that will betransmitted by the base station (e.g., dynamically updating the SIB toreconfigure TRS resources or TRS resource sets that will actually betransmitted by the base station) may be associated with overhead and/orsignificant delay or latency (e.g., because the configuration is astatic configuration).

Therefore, the base station may transmit a TRS availability indicationthat indicates, from a set of configured TRS resources or a set ofconfigured TRS resource sets, which TRSs are to be transmitted by thebase station. The TRS availability indication may be a Layer 1 (L1)(e.g., a physical (PHY) layer) signal. For example, the TRS availabilityindication may be a paging signal. In some examples, the TRSavailability indication may be transmitted via the PDCCH. The TRSavailability indication signaling may be a paging PDCCH signal and/or apaging early indication (PEI) signal, among other examples. A PEI signalmay function as a wake-up signal (WUS) for the idle state or theinactive state. For example, the PEI signal may indicate whether a UE isto receive a paging signal (e.g., before a paging occasion associatedwith the paging signal). The TRS availability indication may be includedin reserved bits (e.g., reserved as defined, or otherwise fixed, by awireless communication standard, such as the 3GPP) of a paging PDCCHsignal. For example, the TRS availability indication signal may includeseparate indications for each of the configured TRS resources or each ofthe configured TRS resource sets. For example, a TRS availabilityindication signal may include a first indication that indicates whethera first TRS resource or a first TRS resource set is to be transmitted bythe base station, a second indication that indicates whether a secondTRS resource or a second TRS resource set is to be transmitted by thebase station, a third indication that indicates whether a third TRSresource or a third TRS resource set is to be transmitted by the basestation, and so on. In some examples, a TRS availability indicationsignal may include an indication of whether a TRS resource or TRSresource set is available (e.g., transmitted by the base station) orunavailable (e.g., not transmitted by the base station).

However, a size of the TRS availability indication (e.g., a number ofinformation bits available to convey the TRS availability indication)may be limited or restricted. For example, the TRS availabilityindication may be included in a paging signal that is associated withconveying other information (e.g., in addition to the TRS availabilityindication). A size (e.g., a number of bits) for the Layer 1 signal(e.g., the paging signal) may be defined, or otherwise fixed, by awireless communication standard, such as the 3GPP. As a result, withoutincreasing the size of the Layer 1 signal, a TRS availability indicationmay be limited or restricted. For example, the TRS availabilityindication may be included in reserved bits of a PDCCH paging signal(e.g., which may be associated with a size of 6 bits, as defined, orotherwise fixed, by a wireless communication standard, such as the 3GPP)or in additional bits of a PEI signal (e.g., which may be associatedwith a size of less than or equal to 32 bits, as defined, or otherwisefixed, by a wireless communication standard, such as the 3GPP). In somecases, the available size of the TRS availability indication (e.g., inthe Layer 1 signal) may not be sufficient to convey an availabilityindication for each configured TRS resource or for each configured TRSresource set. For example, a TRS may be configured for each SSB beam. Insome wireless networks, up to 64 SSB beams may be configured (e.g., andtherefore up to 64 TRS resources or TRS resource sets may beconfigured). Therefore, the Layer 1 signaling used to transmit the TRSavailability indication may have an insufficient size to convey anavailability for each configured TRS resource or for each configured TRSresource set.

Some techniques and apparatuses described herein enable enhanced TRSavailability indications. For example, a UE may receive configurationsof a set of TRS resources or a set of TRS resource sets. The UE mayreceive an availability indication associated with one or more TRSresources or one or more TRS resource sets from the set of TRS resourcesor the set of TRS resource sets. The availability indication indicateswhether TRS resources or TRS resource sets included in the one or moreTRS resources or the one or more TRS resource sets are to be transmittedby the base station. In some aspects, the availability indication may beassociated with one or more groups of TRS resources, associated with theset of TRS resources, or one or more groups of TRS resource setsassociated with the set of TRS resource sets. In some aspects, theavailability indication may be associated with a subset of TRSresources, from the set of TRS resources, or a subset of TRS resourcesets from the set of TRS resource sets.

As a result, a base station may be enabled to transmit, and a UE may beenabled to receive, a TRS availability indication for the set of TRSresources or the set of TRS resource sets in a signal that is associatedwith a limited or restricted available size for the TRS availabilityindication. For example, a group, from the one or more groups of TRSresources or the one or more groups of TRS resource sets, may indicatean availability for TRS resources or TRS resource sets included in thegroup using a single indication (e.g., a single bit). As anotherexample, the availability indication may indicate availabilities for thesubset of TRS resources or the subset of TRS resource sets and anavailability of remaining TRS resources (e.g., from the set of TRSresources) or remaining TRS resource sets (e.g., from the set of TRSresource sets) may be assumed by the UE (e.g., as available orunavailable). Therefore, a size associated with the TRS availabilityindication may be reduced.

FIG. 5 is a diagram illustrating an example 500 associated with TRSavailability indications, in accordance with the present disclosure. Asshown in FIG. 5 , a base station 110 and a UE 120 may communicate withone another in a wireless network, such as the wireless network 100.

As shown by reference number 505, the base station 110 may transmit, andthe UE 120 may receive, configuration information. In some aspects, theUE 120 may receive configuration information from another device (e.g.,from another base station or another UE). In some aspects, the UE 120may receive the configuration information via RRC signaling and/ormedium access control (MAC) signaling (e.g., MAC control elements(MAC-CEs)). In some aspects, the configuration information may includean indication of one or more configuration parameters (e.g., alreadyknown to the UE 120 or hardcoded on the UE 120) for selection by the UE120 and/or explicit configuration information for the UE 120 to use toconfigure itself.

In some aspects, the configuration information may indicate that the UE120 is to receive and/or measure TRSs (e.g., for RRM measurements,tracking loop updates, AGC operations, and/or other operations). Forexample, the configuration information may indicate configurations of aset of TRS resources and/or a set of TRS resource sets. For example, theconfiguration for a TRS resource and/or a TRS resource set may be basedat least in part on a CSI-RS resource configuration (e.g., a non-zeropower (NZP) CSI-RS resource set). In some other aspects, theconfiguration for a TRS resource and/or a TRS resource set may beexplicitly defined by the base station 110 (e.g., and may be independentof another resource configuration). For example, a configuration for aTRS resource and/or a TRS resource set may indicate a time domainresource allocation, a frequency domain resource allocation, an MCS, aperiodicity (e.g., if the resource is a periodic or semi-persistentresource), and/or other configuration parameters (e.g., as defined, orotherwise fixed, by a wireless communication standard, such as the3GPP).

In some aspects, the base station 110 may transmit the configuration forthe set of TRS resources and/or the set of TRS resource sets via asystem information message. For example, the base station 110 maytransmit the configuration for a TRS resource and/or a TRS resource setvia an SIB. This may enable UEs that are not operating in a connectedmode (e.g., an RRC connected mode) to receive the set of TRS resourcesand/or the set of TRS resource sets. For example, if the base station110 were to transmit the configuration for set of TRS resources and/orthe set of TRS resource sets via an RRC configuration, then only UEsoperating in an RRC connected mode may receive the configuration for setof TRS resources and/or the set of TRS resource sets. In this way, UEsoperating in an idle mode (e.g., an RRC idle mode) or an inactive mode(e.g., an RRC inactive mode) may be enabled to receive and utilize TRSstransmitted by the base station for different operations, as describedherein.

In some aspects, the configuration information may indicate that thebase station 110 is to transmit a TRS availability indication. The TRSavailability indication may indicate which TRS resources or TRS resourcesets (e.g., from the configured set of TRS resources and/or set of TRSresource sets) are to be transmitted by the base station 110. Forexample, the base station 110 may dynamically determine whether totransmit a TRS using configured TRS resources of configured TRS resourcesets. Therefore, rather than reconfiguring the configurations (e.g.,rather than updating the SIB), the base station 110 may transmit the TRSavailability indication to enable UEs within the wireless network toidentify which TRS resources or TRS resource sets (e.g., from theconfigured set of TRS resources and/or set of TRS resource sets) are tobe transmitted by the base station 110. In some aspects, the TRSavailability indication may be transmitted by the base station 110 viaLayer 1 signaling. For example, the base station 110 may transmit theTRS availability indication via a paging signal. In some aspects, thebase station 110 may transmit the TRS availability indication via aPDCCH paging signal and/or a PEI signal, among other examples.

In some aspects, the configuration information may indicate that thebase station 110 is to transmit a TRS availability indication that doesnot include a separate indication for each configured TRS resourceand/or for each configured TRS resource set (e.g., an enhanced TRSavailability indication). For example, the configuration information mayindicate that the base station 110 is to transmit a TRS availabilityindication that uses groups, staggered indications, and/or partialindications, as described in more detail elsewhere herein. For example,an indication of one or more groups of TRS resource sets may be includedin the configuration of the set of TRS resource sets (e.g., a groupidentifier may be assigned to a configuration of each TRS resource setor TRS resource). This may enable the base station 110 to transmitindications for a larger quantity of TRS resources and/or TRS resourcesets. For example, using a TRS availability indication that does notinclude a separate indication for each configured TRS resource and/orfor each configured TRS resource set may conserve resources (e.g., mayreduce a size of the TRS availability indication).

The UE 120 may configure the UE 120 for communicating with the basestation 110. In some aspects, the UE 120 may configure the UE 120 basedat least in part on the configuration information. For example, the UE120 may store the configuration for the set of TRS resources and/or theset of TRS resource sets. In some aspects, the UE 120 may be configuredto perform one or more operations described herein.

In some aspects, the UE 120 may transmit, and the base station 110 mayreceive, an indication of a capability of the UE 120 to communicate(e.g., one or more of uplink transmissions or downlink transmissions)using the TRS availability indication described herein. For example, theUE 120 may indicate a capability of the UE 120 to communicate using TRSavailability indications. In some aspects, the UE 120 may indicate acapability of the UE 120 to communicate using a TRS availabilityindication that does not include a separate indication for eachconfigured TRS resource and/or for each configured TRS resource set(e.g., an enhanced TRS availability indication), as described in moredetail elsewhere herein. In some aspects, the UE 120 may transmit theindication via RRC signaling, one or more MAC-CEs, and/or a PUCCHmessage, among other examples.

As shown by reference number 510, the base station 110 may transmit, andthe UE 120 may receive, a TRS availability indication. In some aspects,the TRS availability indication may be associated with one or moregroups of TRS resources and/or one or more groups of TRS resource sets.In some aspects, the TRS availability indication may be a staggered TRSavailability indication. For example, a first signal transmitted by thebase station 110 (e.g., at a first time) may indicate an availability ofa first subset of TRS resources (e.g., from the set of configured TRSresources), a first subset of TRS resource sets (e.g., from the set ofconfigured TRS resource sets), a first group of TRS resources, and/or afirst group of TRS resource sets. A second signal transmitted by thebase station 110 (e.g., at a second time) may indicate an availabilityof a second subset of TRS resources (e.g., from the set of configuredTRS resources), a second subset of TRS resource sets (e.g., from the setof configured TRS resource sets), a second group of TRS resources,and/or a second group of TRS resource sets. In some aspects, the TRSavailability indication may be a partial indication. For example, theTRS availability indication may include indications associated with asubset of TRS resources (e.g., from the set of configured TRS resources)and/or a subset of TRS resource sets (e.g., from the set of configuredTRS resource sets). If the TRS availability indication is a partialindication, then the TRS availability indication may not includeindications associated with the remaining TRS resources (e.g., from theset of configured TRS resources) and/or the remaining TRS resource sets(e.g., from the set of configured TRS resource sets).

In some aspects, the network (e.g., the base station 110) may configurethe one or more groups of TRS resources and/or the one or more groups ofTRS resource sets. For example, the base station 110 may transmit, andthe UE 120 may receive, an indication of the one or more groups of TRSresources and/or the one or more groups of TRS resource sets. In someaspects, the indication of the one or more groups of TRS resourcesand/or the one or more groups of TRS resource sets may be included inthe configuration of the set of TRS resources and/or the set of TRSresource sets (e.g., may be included in the SIB that configures the setof TRS resources and/or the set of TRS resource sets). For example, theconfiguration of the one or more groups of TRS resources and/or the oneor more groups of TRS resource sets may be broadcast in a SIB (e.g., theSIB that configures the set of TRS resources and/or the set of TRSresource sets). In some other aspects, the indication of the one or moregroups of TRS resources and/or the one or more groups of TRS resourcesets may be included in another message, such as a Layer 1 message or adynamic message.

In some aspects, a configuration may indicate, for a TRS resource or aTRS resource set, an identifier of a group associated with the TRSresource or the TRS resource set. For example, the one or more groupsmay be based at least in part on a group index assigned to theconfiguration of each TRS resource set or TRS resource. For example, theconfiguration, of a TRS resource or a TRS resource set, may include agroup index in a field of the configuration. The index may map to agroup that the TRS resource or the TRS resource set is included in forTRS availability indications, as described in more detail elsewhereherein.

In some aspects, the base station 110 may transmit, and the UE 120 mayreceive, one or more group configurations associated with the one ormore groups of TRS resources and/or the one or more groups of TRSresource sets. In some aspects, a group configuration, of the one ormore group configurations, indicates identifiers of one or more TRSresources and/or one or more TRS resource sets included in a groupassociated with the group configuration. For example, the one or moregroups may be based at least in part on group configurations, where eachgroup configuration indicates a list of identifiers of configured TRSresource sets and/or configured TRS resources. The indication of the oneor more group configurations may be included in a SIB (e.g., the SIBthat configures the set of TRS resources and/or the set of TRS resourcesets).

In some aspects, a quantity (e.g., T) of TRS resources and/or TRSresource sets to be included in each group, of the one or more groups ofTRS resources or the one or more groups of TRS resource sets, may bedefined (e.g., by the base station 110 or a wireless communicationstandard). In such examples, a group, of the one or more groups of TRSresources and/or the one or more groups of TRS resource sets, may beformed (e.g., by the UE 120 and/or the base station 110) based at leastin part on the quantity and based at least in part on identifiers of theset of TRS resources and/or identifiers of the set of TRS resource sets.For example, the identifiers of the set of TRS resources and/oridentifiers of the set of TRS resource sets may be associated with anorder (e.g., from a lowest identifier to a highest identifier). The UE120 and/or the base station 110 may form a first group by include afirst T TRS resources and/or T TRS resource sets (e.g., starting at thelowest identifier or the higher identifier). The UE 120 and/or the basestation 110 may form a second group by including a next T TRS resourcesand/or a next T TRS resource sets in accordance with the order. The UE120 and/or the base station 110 may form a third group by including anext T TRS resources and/or a next T TRS resource sets in accordancewith the order. The UE 120 and the base station 110 may continue to formgroups in this manner (e.g., including T TRS resources and/or T TRSresource sets in each group) until all configured TRS resources and/orall configured TRS resource sets are assigned to a group.

For example, a first group may include a first subset of TRS resourcesor a first subset of TRS resource sets, from the set of TRS resources orthe set of TRS resource sets, and a second group may include a secondsubset of TRS resources or a second subset TRS resource sets from theset of TRS resources or the set of TRS resource sets. The first groupand the second group both include the quantity (e.g., T) of the TRSresources or the TRS resource sets. TRS resources or TRS resource setsincluded in the first group and the second group may be based at leastin part on the order of the identifiers of the set of TRS resources orthe order of the identifiers of the set of TRS resource sets.

In some aspects, the groups may be configured by the base station 110,as described in more detail elsewhere herein. In some other aspects, thegroups may be formed based at least in part on one or more rulesdefined, or otherwise fixed by a wireless communication standard, suchas the 3GPP. For example, the one or more rules may indicate how a group(e.g., associated with the TRS availability indication) is to be formed.The base station 110 and the UE 120 may form the one or more group inaccordance with the one or more rules (e.g., without a configuration orindication of the one or more groups being explicitly signaled by thebase station 110).

The groups associated with the TRS availability indication may includeTRS resources and/or TRS resource sets that are associated withdifferent QCL references and/or different SSB beams (e.g., different SSBindices). For example, groups associated with the TRS availabilityindication may be contrasted from TRS resource sets in that TRSresources included in a TRS resource set may all be associated with thesame QCL reference and/or the same SSB beam. A group associated with theTRS availability indication may be formed to include TRS resourcesand/or TRS resource sets that are associated with different QCLreferences and/or different SSB beams.

In some aspects, the TRS availability indication may include anindication for each group of the one or more groups of TRS resources orthe one or more groups of TRS resource sets. An indication, for a group,may indicate whether all TRS resources or all TRS resource sets includedin the group are to be transmitted by the base station 110 (e.g., oneindication or one bit that applies to all TRS resources or TRS resourcesets included in the group). For example, the network (e.g., the basestation 110) may group TRS resource sets and/or TRS resources andsimultaneously indicate whether all the TRS resources or TRS resourcesets within the group are transmitted or not. For example, the TRSavailability indication may include one indication (e.g., one bit) foreach group in the Layer 1 TRS availability indication signaling. In thisway, the base station 110 may be enabled to signal an availability for alarger quantity of TRS resources and/or TRS resource sets withoutincreasing a size of the Layer 1 TRS availability indication signaling.

In some aspects, a quantity of groups formed for the TRS availabilityindication may be based at least in part on a quantity of bits available(e.g., in the Layer 1 signaling) for the TRS availability indication.For example, if 6 bits are available in a PDCCH paging signal thatcarries the TRS availability indication, then 6 groups may be formed(e.g., in a similar manner as described above) for the TRS availabilityindication. For example, if 8 TRS resource sets (e.g., associated withindex values from 0 to 7) are configured (e.g., associated with 8 SSBs),then the one or more groups may include 6 groups. The 6 groups may beformed as {0, 1}, {2, 3}, {4}, {5}, {6}, and {7} (e.g., with each numberindicating an index value of a TRS resource or TRS resource set). Forexample, the groups associated with the TRS availability indication mayinclude different quantities of TRS resource and/or TRS resource sets(e.g., in the example described above, the first 2 groups include 2 TRSresource sets and the remaining groups each include 1 TRS resource set).As another example, if 24 TRS resource sets (e.g., associated with indexvalues from 0 to 23) are configured (e.g., associated with 24 SSBs),then the one or more groups may be formed into 4 groups as {0 to 5}, {6to 11}, {12 to 17}, and {18 to 23} (e.g., with each group including 6TRS resource sets). As another example, the 24 TRS resource sets may beformed into 6 groups, such as {0 to 3}, {4 to 7}, {8 to 11}, {12 to 15},{16 to 19}, and {20 to 23}. As another example, if 28 TRS resource sets(e.g., associated with index values from 0 to 27) are configured (e.g.,associated with 28 SSBs), then the one or more groups may be formed intothen 28 TRS resource sets may be formed into 6 groups, such as {0 to 4},{5 to 9}, {10 to 14}, {15 to 19}, {20 to 24}, and {25 to 27}.

As described in more detail elsewhere herein, the TRS availabilityindication may include separate indications for each group. For example,each group may be associated with a bit in a bitmap of the L1 TRSavailability indication signaling (e.g., a single bit per group in theL1 TRS availability indication signaling). For example, if 6 groups areformed, then the TRS availability indication may include 6 indications(e.g., 6 bits). For example, 1 bit may be used to indicate anavailability of a group, where a value of “0” indicates that the groupis unavailable (e.g., not transmitted by the base station 110) and avalue of “1” indicates that the group is available (e.g., transmitted bythe base station 110). For example, referring to the example describedabove where 28 TRS resource sets (or TRS resources) are formed into 6groups of {0 to 4}, {5 to 9}, {10 to 14}, {15 to 19}, {20 to 24}, and{25 to 27}, a first bit of the TRS availability indication may indicatea value of “0,” thereby indicating that TRS resources or TRS resourcesets associated with index values from 0 to 4 are unavailable (e.g., nottransmitted by the base station 110). A second bit of the TRSavailability indication may indicate a value of “1,” thereby indicatingthat TRS resources or TRS resource sets associated with index valuesfrom 5 to 9 are available (e.g., are transmitted by the base station110). The TRS availability indication may include 6 bits (e.g., in abitmap) indicating the availability of each group in a similar manner asdescribed above. As a result, 6 bits (e.g., rather than 28 bits) may beused by the base station 110 to indicate the availability of the 28 TRSresource sets (or TRS resources).

In some aspects, the TRS availability indication may be associated withstaggered indications. “Staggered indications” may refer to differentsignals, that are transmitted at different times, being associated withavailability indications for different TRS resources or different TRSresource sets. For example, the TRS availability indication may beassociated with multiple signals. Each signal, of the multiple signals,may indicate an availability associated with a group of the one or moregroups of TRS resources or the one or more groups of TRS resource sets.In other words, the base station 110 may transmit, and the UE 120 mayreceive, a first availability indication associated with a first groupof the one or more groups of TRS resources or the one or more groups ofTRS resource sets. The base station 110 may transmit, and the UE 120 mayreceive, a second availability indication associated with a second groupof the one or more groups of TRS resources or the one or more groups ofTRS resource sets. The first availability indication may be transmittedand/or received using a first set of time-frequency resources, andwherein the second availability indication may be transmitted and/orreceived using a second set of time-frequency resources. The firstavailability indication may indicate whether TRS resources or TRSresource sets, included in the first group, are to be transmitted by thebase station 110. The second availability indication may indicatewhether TRS resources or TRS resource sets, included in the secondgroup, are to be transmitted by the base station 110.

In some aspects, the first availability indication includes separateindications for each TRS resource or TRS resource set included in thefirst group. Similarly, the second availability indication may includeseparate indications for each TRS resource or TRS resource set includedin the second group. In other words, one bit in the indication may bemapped to one TRS resource set or to one TRS resource. For example,rather than a single bit or a single indication applying to all TRSresources or all TRS resource sets in the group, the base station 110may use staggered indications to enable each signal to include separateindications for each TRS resource or TRS resource set included in agroup. For example, because each signal is associated with less than thetotal quantity of configured TRS resources or TRS resources sets (e.g.,each signal is associated with one (or more) groups), the base station110 may be enabled to indicate an availability of a larger quantity ofTRS resources or TRS resource sets without increasing a size of eachindividual signal.

Groups associated with the staggered indications may be formed in asimilar (or the same) manner as described in more detail elsewhereherein. In some aspects, a group associated with the staggeredindications may include one or more groups of TRS resources and/orgroups of TRS resource sets (e.g., that are formed in a similar (or thesame) manner as described in more detail elsewhere herein). For example,a group associated with the staggered indications may include a firstgroup of TRS resource sets, a second group of TRS resource sets, a thirdgroup of TRS resource sets, and so on. Each indication (e.g., each bit)included in the availability indication may map to, or be associatedwith, a group of TRS resource sets or a group of TRS resources.

In some aspects, a pattern or timing of the staggered indications may bebased at least in part on a paging cycle associated with the UE 120. Insome aspects, the paging cycle may be, or may be based at least in parton, a discontinuous reception (DRX) cycle associated with the UE 120.For example, the UE 120 may monitor one or more paging occasions duringeach paging cycle. A paging occasion may be a set of PDCCH monitoringoccasions and may consist of multiple time slots (e.g. subframes or OFDMsymbols) during which a paging signal may be transmitted (e.g., by thebase station 110). For example, the first availability indication (e.g.,described in the example above) may be transmitted and/or receivedduring a first paging cycle and the second availability indication maybe transmitted and/or received during a second paging cycle.

In some aspects, the base station 110 may use a transmission patternand/or repetitions associated with the staggered indications. As usedherein, “repetition” may refer to a communication that is transmittedmore than one time, and includes the initial transmission of thatcommunication as well as each subsequent transmission of thatcommunication. For example, each repetition may be identical copies ofone another. In some aspects, the base station 110 may transmit one ormore repetitions of an availability indication (e.g., associated with agroup) during a paging cycle. In some aspects, the base station 110 maytransmit multiple availability indications (e.g., associated withdifferent groups) during the same paging cycle. For example, the basestation 110 may transmit a first availability indication (e.g.,associated with a first group) and a second availability indication(e.g., associated with a second group) during the same paging cycle. Insome aspects, the transmission pattern and/or repetitions associatedwith the staggered indications may be configured by the base station110. Additionally, or alternatively, the transmission pattern and/orrepetitions associated with the staggered indications may be defined, orotherwise fixed, by a wireless communication standard, such as the 3GPP.Examples of transmission patterns and/or repetitions associated with thestaggered indications are depicted and described in more detail inconnection with FIG. 6 .

In some aspects, each TRS availability indication (e.g., each signal)associated with the staggered indications may be associated with avalidity duration. “Validity duration” may refer to an amount of timefor which the information included in the TRS availability indication isvalid or can be applied by the UE 120. The validity duration may also bereferred to as a validity window. In some aspects, the staggeredindications may each be associated with the same validity duration. Forexample, a first availability indication (e.g., associated with a firstgroup) and a second availability indication (e.g., associated with asecond group) may associated with the same validity duration. “Samevalidity duration” may refer to a validity duration that has a commonstart point and a common end point (e.g., in time) for each indicationassociated with the staggered indications (e.g., a common start pointand a common end point for both the first availability indication andthe second availability indication). In other words, a common start andend of the validity duration may be defined for all L1 availabilityindications associated with staggered indications. In some aspects, thecommon start point and common end point may be defined based at least inpart on the paging cycle associated with the UE 120. For example, thevalidity duration may be defined from a start of a paging cycle to anend of the paging cycle. In some aspects, the validity duration may bedefined based at least in part on a quantity of paging cycles. Forexample, the validity duration may indicate that the staggeredindications are valid for a next L paging cycles, where L is a quantityof paging cycles.

In some aspects, the staggered indications may be associated withdifferent validity durations. For example, an amount of time associatedwith each validity durations may be the same, but a start point and/orend point for the validity durations may be different. For example, afirst availability indication may be associated with a first validityduration (e.g., a first start point and a first end point for the firstvalidity duration) and a second availability indication is associatedwith a second validity duration (e.g., a second start point and a secondend point for the second validity duration). The first validity durationand the second validity duration may be associated with the same amountof time, but different start points and different end points. Forexample, the start point and/or end point of a validity duration may bebased at least in part on a time when the availability indicationassociated with the validity duration is received. For example, thefirst validity duration may be based at least in part on a first time atwhich the first availability indication is received. The second validityduration may be based at least in part on a second time at which thesecond availability indication is received. In other words, a location(e.g., in the time domain) where each L1 availability indication isreceived may be used as a reference time for the start of the validityduration. In some aspects, a delay offset may be applied from the timeat which the indication is received to the start point of the validityduration (e.g., the validity duration for an availability indication maystart Z milliseconds or Z symbols after the availability indication isreceived, where Z is the delay offset). For example, the delay offsetmay be associated with an amount of time for the UE 120 to decode theavailability indication.

In some aspects, the TRS availability indication transmitted by the basestation 110 may be a partial indication. As used herein, “partialindication” may refer to a TRS availability indication that isassociated with a subset of TRS resources, from the set of configuredTRS resources, or a subset of TRS resource sets from the set ofconfigured TRS resource sets. For example, if a partial indication isused by the base station 110, then the base station 110 may not indicatean availability of one or more configured TRS resources and/orconfigured TRS resource sets (e.g., in any TRS availability indication).For example, a partial indication may indicate whether the subset of TRSresources or the subset of TRS resource sets from the set of TRSresource sets are to be transmitted by the base station 110.

For the remaining TRS resources and/or the remaining TRS resource sets,the UE 120 may assume whether the remaining TRS resources and/or theremaining TRS resource sets are to be transmitted by the base station110. “Remaining TRS resources” may refer to TRS resources, from the setof configured TRS resources, that are not indicated by the partial TRSavailability indication. For example, remaining TRS resources may referto TRS resources, from the set of configured TRS resources, that are notincluded in the subset of TRS resources associated with the partialindication. Similarly, “remaining TRS resource sets” may refer to TRSresource sets, from the set of configured TRS resource sets, that arenot indicated by the partial TRS availability indication. For example,the remaining TRS resource sets may refer to TRS resource sets, from theset of configured TRS resource sets, that are not included in the subsetof TRS resource sets associated with the partial indication.

In some aspects, the UE 120 may identify that remaining TRS resourcesand/or remaining TRS resource sets are to be transmitted by the basestation 110. For example, a rule may be defined (e.g., by the basestation 110 and/or a wireless communication standard) that indicatesthat remaining TRS resources and/or remaining TRS resource sets arealways available (e.g., always transmitted by the base station 110without any further Layer 1 signaling). Alternatively, the rule mayindicate that remaining TRS resources and/or remaining TRS resource setsare always unavailable (e.g., always not transmitted by the base station110).

In some aspects, the base station 110 may transmit, and the UE 120 mayreceive, an indication of whether the UE 120 is to identify that thebase station 110 is to transmit or not transmit remaining TRS resourcesor remaining TRS resource sets, from the set of TRS resources or the setof TRS resource sets, that are not included in the availabilityindication. For example, the base station 110 may indicate (e.g., in aSIB) whether the UE is to assume that remaining TRS resources and/orremaining TRS resource sets (e.g., that are not indicated by the TRSavailability indication) are available or unavailable. For example, asingle bit in a SIB may indicate that the UE 120 is to assume thatremaining TRS resources and/or remaining TRS resource sets are availableor unavailable.

In some aspects, the TRS availability indication may use a combinationof groups, staggered indications, and/or partial indications, asdescribed in more detail elsewhere herein. For example, the TRSavailability indication may be associated with one or more groups of TRSresources and/or one or more groups of TRS resource sets and may beassociated with a partial indication. As another example, the TRSavailability indication may be associated with one or more groups of TRSresources and/or one or more groups of TRS resource sets and may beassociated with staggered indications. As another example, the TRSavailability indication may be associated with staggered indications andmay be associated with a partial indication. By transmitting a TRSavailability indication as described in more detail elsewhere herein,the base station 110 may be enabled to transmit a TRS availabilityindication that is associated with a smaller quantity of bits than thequantity of configured TRS resources and/or quantity of configured TRSresource sets.

As shown by reference number 515, the UE 120 may determine or identifyavailable TRS resources and/or available TRS resource sets based atleast in part on receiving the TRS availability indication. For example,the UE 120 may identify one or more TRS resources and/or one or more TRSresource sets that are to be used by the base station 110 to transmit aTRS. In some aspects, the UE 120 may monitor the one or more TRSresources and/or one or more TRS resource sets that are to be used bythe base station 110 to transmit a TRS (e.g., to enable the UE 120 toreceive the TRS). The UE 120 may refrain from monitoring unavailable TRSresources and/or unavailable TRS resource sets (e.g., as indicated bythe TRS availability indication). For example, the UE 120 may identifyone or more TRS resources and/or one or more TRS resource sets (e.g.,from the configuration indicated by a SIB) that are not to be used bythe base station 110 to transmit a TRS. The UE 120 may refrain frommonitoring the one or more TRS resources and/or one or more TRS resourcesets that are not to be used by the base station 110 to transmit a TRS.This may conserve resources (e.g., power resources, processingresources, and/or other resources) of the UE 120 that would haveotherwise been used to monitor TRS resources and/or TRS resource sets(e.g., from the configured TRS resources and/or the configured TRSresource sets) that are not used by the base station 110.

As shown by reference number 520, the base station 110 may transmit, andthe UE 120 may receive, a TRS using a TRS resource, from the set of TRSresources, or a TRS resource set from the set of TRS resource sets,based at least in part on the TRS availability indication. For example,the base station 110 may transmit, and the UE 120 may receive, the TRSusing a TRS resource and/or a TRS resource set that is indicated asavailable by the TRS availability indication.

As a result, the base station 110 may be enabled to transmit, and a UE120 may be enabled to receive, a TRS availability indication for the setof configured TRS resources or the set of configured TRS resource setsin a signal that is associated with a limited or restricted availablesize for the TRS availability indication. In other words, the basestation 110 may be enabled to use a TRS availability indication that isassociated with a smaller quantity of bits than a quantity of configuredTRS resources and/or a quantity of configured TRS resource sets.

As indicated above, FIG. 5 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 5 .

FIG. 6 is a diagram illustrating examples 600, 610, and 620 associatedwith staggered TRS availability indications, in accordance with thepresent disclosure. As shown in FIG. 6 , a base station (e.g., a basestation 110) may transmit, to a UE (e.g., a UE 120) one or more TRSavailability indications, as described in more detail elsewhere herein,such as in connection with FIG. 5 . The examples 600, 610, and 620depict examples of staggered indications associated with a TRSavailability indication (e.g., as described in more detail in connectionwith FIG. 5 ).

As described in more detail elsewhere herein, the staggered indicationsmay be associated with groups of TRS resources and/or groups of TRSresource sets. Examples 600, 610, and 620 depict examples in which 4groups (e.g., group 0, group 1, group 2, and group 3) are formed for thestaggered indications. In other examples, a different quantity of groupsmay be formed and the staggered indications may be transmitted in asimilar manner as described herein. The staggered indications may beassociated with, or may be based at least in part on, a paging cycle(e.g., a DRX cycle) associated with the UE.

Example 600 depicts an example in which the base station transmits a TRSavailability indication associated with a different group during eachpaging cycle. For example, as shown in FIG. 6 , during a first pagingcycle, the base station may transmit, and the UE may receive, a firstTRS availability indication associated with the group 0. During a secondpaging cycle, the base station may transmit, and the UE may receive, asecond TRS availability indication associated with the group 1. During athird paging cycle, the base station may transmit, and the UE mayreceive, a third TRS availability indication associated with the group2. During a fourth paging cycle, the base station may transmit, and theUE may receive, a fourth TRS availability indication associated with thegroup 3. After the fourth paging cycle (e.g., in a fifth paging cyclenot shown in FIG. 6 ), the base station may transmit, and the UE mayreceive, another TRS availability indication associated with the group0. The base station may continue to transmit staggered TRS availabilityindications following the pattern described above. As shown in FIG. 6 ,and example 600, the base station may transmit a single indication(e.g., a single Layer 1 indication) during each paging cycle.

Example 610 depicts an example in which the base station transmits oneor more repetitions of a TRS availability indication associated with adifferent group during each paging cycle. In other words, the basestation may transmit multiple repetitions (e.g., multiple Layer 1indications) associated with the same group during a paging cycle. Forexample, as shown in FIG. 6 , during a first paging cycle, the basestation may transmit, and the UE may receive, one or more repetitions ofa first TRS availability indication associated with the group 0. Duringa second paging cycle, the base station may transmit, and the UE mayreceive, one or more repetitions of a second TRS availability indicationassociated with the group 1. During a third paging cycle, the basestation may transmit, and the UE may receive, one or more repetitions ofa third TRS availability indication associated with the group 2. Duringa fourth paging cycle, the base station may transmit, and the UE mayreceive, one or more repetitions of a fourth TRS availability indicationassociated with the group 3. After the fourth paging cycle (e.g., in afifth paging cycle not shown in FIG. 6 ), the base station may transmit,and the UE may receive, another one or more repetitions of a TRSavailability indication associated with the group 0. The base stationmay continue to transmit staggered TRS availability indications withrepetitions following the pattern described above. The quantity ofrepetitions transmitted during each paging cycle may be configured bythe base station and/or may be defined by a wireless communicationstandard, such as the 3GPP. In some aspects, the quantity of repetitionstransmitted during each paging cycle may vary over time (e.g., the basestation may transmit a first quantity of repetitions during a firstpaging cycle and may transmit a second quantity of repetitions during asecond paging cycle).

Example 620 depicts an example in which the base station transmitsmultiple TRS availability indications associated with different groupsduring the same paging cycle. Example 620 depicts 2 TRS availabilityindications transmitted during each paging cycle. However, a differentquantity of TRS availability indications may be transmitted during eachpaging cycle. As shown in FIG. 6 , and example 620, during a firstpaging cycle, the base station may transmit, and the UE may receive, afirst TRS availability indication associated with the group 0 and asecond TRS availability indication associated with the group 1. During asecond paging cycle, the base station may transmit, and the UE mayreceive, a third TRS availability indication associated with the group 2and a fourth TRS availability indication associated with the group 3.During a third paging cycle, the base station may transmit, and the UEmay receive, a fifth TRS availability indication associated with thegroup 0 and a sixth TRS availability indication associated with thegroup 1. The fifth TRS availability indication and the first TRSavailability indication may be associated with the same group (e.g., ofTRS resources and/or TRS resource sets) and may indicate the same ordifferent availability for the group 0. Similarly, the sixth TRSavailability indication and the second TRS availability indication maybe associated with the same group (e.g., of TRS resources and/or TRSresource sets) and may indicate the same or different availability forthe group 1. During a fourth paging cycle, the base station maytransmit, and the UE may receive, a seventh TRS availability indicationassociated with the group 2 and an eighth TRS availability indicationassociated with the group 3. As described above, the seventh TRSavailability indication and the third TRS availability indication mayboth be associated with the group 2 and may indicate the same or adifferent availability for the group 2. Similarly, the eighth TRSavailability indication and the fourth TRS availability indication mayboth be associated with the group 3 and may indicate the same or adifferent availability for the group 3. The base station may continue totransmit staggered TRS availability indications, with multipleindications associated with different groups transmitted during the samepaging cycle, following the pattern described above.

In some aspects, a combination of techniques or operations described inconnection with example 600, example 610, and/or example 620 may be usedby the base station to transmit staggered TRS availability indications.For example, the base station may transmit one or more repetitions of afirst TRS availability indication (e.g., associated with a first group)and one or more repetitions of a second TRS availability indication(e.g., associated with a second group) during the same paging cycle.

As indicated above, FIG. 6 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 6 .

FIG. 7 is a diagram illustrating an example process 700 performed, forexample, by a UE, in accordance with the present disclosure. Exampleprocess 700 is an example where the UE (e.g., UE 120) performsoperations associated with TRS availability indication.

As shown in FIG. 7 , in some aspects, process 700 may include receiving,from a base station, configurations of a set of TRS resources or a setof TRS resource sets (block 710). For example, the UE (e.g., usingcommunication manager 140 and/or reception component 902, depicted inFIG. 9 ) may receive configurations of a set of TRS resources or a setof TRS resource sets, as described above.

As further shown in FIG. 7 , in some aspects, process 700 may includereceiving, from the base station, an availability indication associatedwith one or more TRS resources or one or more TRS resource sets from theset of TRS resources or the set of TRS resource sets, wherein theavailability indication indicates whether TRS resources or TRS resourcesets included in the one or more TRS resources or the one or more TRSresource sets are to be transmitted by the base station, and wherein theavailability indication is associated with at least one of: one or moregroups of TRS resources, associated with the set of TRS resources, orone or more groups of TRS resource sets associated with the set of TRSresource sets; or a subset of TRS resources, from the set of TRSresources, or a subset of TRS resource sets from the set of TRS resourcesets (block 720). For example, the UE (e.g., using communication manager140 and/or reception component 902, depicted in FIG. 9 ) may receive,from the base station, an availability indication associated with one ormore TRS resources or one or more TRS resource sets from the set of TRSresources or the set of TRS resource sets, wherein the availabilityindication indicates whether TRS resources or TRS resource sets includedin the one or more TRS resources or the one or more TRS resource setsare to be transmitted by the base station, and wherein the availabilityindication is associated with at least one of: one or more groups of TRSresources, associated with the set of TRS resources, or one or moregroups of TRS resource sets associated with the set of TRS resourcesets; or a subset of TRS resources, from the set of TRS resources, or asubset of TRS resource sets from the set of TRS resource sets, asdescribed above.

Process 700 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, the availability indication is received via Layer 1signaling.

In a second aspect, alone or in combination with the first aspect, theavailability indication is associated with a paging signal.

In a third aspect, alone or in combination with one or more of the firstand second aspects, process 700 includes receiving, from the basestation, an indication of the one or more groups of TRS resources or theone or more groups of TRS resource sets.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, the indication of the one or more groups ofTRS resources or the one or more groups of TRS resource sets is includedin the configuration of the set of TRS resources or the set of TRSresource sets.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, the configuration indicates, for a TRS resourceor a TRS resource set, an identifier of a group associated with the TRSresource or the TRS resource set.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, process 700 includes receiving, from the basestation, one or more group configurations associated with the one ormore groups of TRS resources or the one or more groups of TRS resourcesets, wherein a group configuration, of the one or more groupconfigurations, indicates identifiers of one or more TRS resources orone or more TRS resource sets included in a group associated with thegroup configuration.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, a quantity of TRS resources or TRS resourcesets to be included in each group, of the one or more groups of TRSresources or the one or more groups of TRS resource sets, is defined,and wherein a group, of the one or more groups of TRS resources or theone or more groups of TRS resource sets, is formed based at least inpart on the quantity and based at least in part on identifiers of theset of TRS resources or identifiers of the set of TRS resource sets.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, a first group includes a first subset ofTRS resources or TRS resource sets, from the set of TRS resources or theset of TRS resource sets, and a second group includes a second subset ofTRS resources or TRS resource sets from the set of TRS resources or theset of TRS resource sets, wherein the first group and the second groupboth include the quantity of the TRS resources or the TRS resource sets,and wherein TRS resources or TRS resource sets included in the firstgroup and the second group are based at least in part on an order of theidentifiers of the set of TRS resources or an order of the identifiersof the set of TRS resource sets.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, a group, of the one or more groups of TRSresources or the one or more groups of TRS resource sets, includes TRSresources or TRS resource sets that are associated with different QCLreferences.

In a tenth aspect, alone or in combination with one or more of the firstthrough ninth aspects, the availability indication includes anindication for each group of the one or more groups of TRS resources orthe one or more groups of TRS resource sets, and wherein an indication,for a group, indicates whether all TRS resources or all TRS resourcesets included in the group are to be transmitted by the base station.

In an eleventh aspect, alone or in combination with one or more of thefirst through tenth aspects, the availability indication is associatedwith multiple signals, and wherein each signal, of the multiple signals,indicates an availability associated with a group of the one or moregroups of TRS resources or the one or more groups of TRS resource sets.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, receiving the availability indicationincludes receiving, from the base station, a first availabilityindication associated with a first group of the one or more groups ofTRS resources or the one or more groups of TRS resource sets, andreceiving, from the base station, a second availability indicationassociated with a second group of the one or more groups of TRSresources or the one or more groups of TRS resource sets.

In a thirteenth aspect, alone or in combination with one or more of thefirst through twelfth aspects, the first availability indication isreceived using a first set of time-frequency resources, and wherein thesecond availability indication is received using a second set oftime-frequency resources.

In a fourteenth aspect, alone or in combination with one or more of thefirst through thirteenth aspects, the first availability indicationindicates whether TRS resources or TRS resource sets, included in thefirst group, are to be transmitted by the base station, and the secondavailability indication indicates whether TRS resources or TRS resourcesets, included in the second group, are to be transmitted by the basestation.

In a fifteenth aspect, alone or in combination with one or more of thefirst through fourteenth aspects, the first availability indicationincludes separate indications for each TRS resource or TRS resource setincluded in the first group, and the second availability indicationincludes separate indications for each TRS resource or TRS resource setincluded in the second group.

In a sixteenth aspect, alone or in combination with one or more of thefirst through fifteenth aspects, the first availability indication isreceived during a first paging cycle, and the second availabilityindication is received during a second paging cycle.

In a seventeenth aspect, alone or in combination with one or more of thefirst through sixteenth aspects, the first availability indication andthe second availability indication are associated with a same validityduration.

In an eighteenth aspect, alone or in combination with one or more of thefirst through seventeenth aspects, the same validity duration isassociated with a common start point and a common end point for both thefirst availability indication and the second availability indication.

In a nineteenth aspect, alone or in combination with one or more of thefirst through eighteenth aspects, the first availability indication isassociated with a first validity duration and the second availabilityindication is associated with a second validity duration.

In a twentieth aspect, alone or in combination with one or more of thefirst through nineteenth aspects, the first validity duration is basedat least in part on a first time at which the first availabilityindication is received, and wherein the second validity duration isbased at least in part on a second time at which the second availabilityindication is received.

In a twenty-first aspect, alone or in combination with one or more ofthe first through twentieth aspects, the availability indicationindicates whether the subset of TRS resources or the subset of TRSresource sets from the set of TRS resource sets are to be transmitted bythe base station.

In a twenty-second aspect, alone or in combination with one or more ofthe first through twenty-first aspects, remaining TRS resources orremaining TRS resource sets are to be transmitted by the base station,and the remaining TRS resources or the remaining TRS resource sets areTRS resources or TRS resource sets, from the set of TRS resources or theset of TRS resource sets, that are not included in the subset of TRSresources or the subset of TRS resource sets.

In a twenty-third aspect, alone or in combination with one or more ofthe first through twenty-second aspects, remaining TRS resources orremaining TRS resource sets are not to be transmitted by the basestation, and the remaining TRS resources or the remaining TRS resourcesets are TRS resources or TRS resource sets, from the set of TRSresources or the set of TRS resource sets, that are not included in thesubset of TRS resources or the subset of TRS resource sets.

In a twenty-fourth aspect, alone or in combination with one or more ofthe first through twenty-third aspects, process 700 includes receiving,from the base station, an indication of whether the UE is to identifythat the base station is to transmit or not transmit remaining TRSresources or remaining TRS resource sets, from the set of TRS resourcesor the set of TRS resource sets, that are not included in theavailability indication.

In a twenty-fifth aspect, alone or in combination with one or more ofthe first through twenty-fourth aspects, process 700 includes receiving,from the base station, a TRS using a TRS resource, from the set of TRSresources, or a TRS resource set from the set of TRS resource sets,based at least in part on the availability indication.

Although FIG. 7 shows example blocks of process 700, in some aspects,process 700 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 7 .Additionally, or alternatively, two or more of the blocks of process 700may be performed in parallel.

FIG. 8 is a diagram illustrating an example process 800 performed, forexample, by a base station, in accordance with the present disclosure.Example process 800 is an example where the base station (e.g., basestation 110) performs operations associated with TRS availabilityindication.

As shown in FIG. 8 , in some aspects, process 800 may includetransmitting, to UEs, configurations of a set of TRS resources or a setof TRS resource sets (block 810). For example, the base station (e.g.,using communication manager 150 and/or transmission component 1004,depicted in FIG. 10 ) may transmit, to one or more UEs, configurationsof a set of TRS resources or a set of TRS resource sets, as describedabove.

As further shown in FIG. 8 , in some aspects, process 800 may includetransmitting an availability indication associated with one or more TRSresources or one or more TRS resource sets from the set of TRS resourcesor the set of TRS resource sets, wherein the availability indicationindicates whether TRS resources or TRS resource sets included in the oneor more TRS resources or the one or more TRS resource sets are to betransmitted by the base station, and wherein the availability indicationis associated with at least one of: one or more groups of TRS resources,associated with the set of TRS resources, or one or more groups of TRSresource sets associated with the set of TRS resource sets; or a subsetof TRS resources, from the set of TRS resources, or a subset of TRSresource sets from the set of TRS resource sets (block 820). Forexample, the base station (e.g., using communication manager 150 and/ortransmission component 1004, depicted in FIG. 10 ) may transmit anavailability indication associated with one or more TRS resources or oneor more TRS resource sets from the set of TRS resources or the set ofTRS resource sets, wherein the availability indication indicates whetherTRS resources or TRS resource sets included in the one or more TRSresources or the one or more TRS resource sets are to be transmitted bythe base station, and wherein the availability indication is associatedwith at least one of: one or more groups of TRS resources, associatedwith the set of TRS resources, or one or more groups of TRS resourcesets associated with the set of TRS resource sets; or a subset of TRSresources, from the set of TRS resources, or a subset of TRS resourcesets from the set of TRS resource sets, as described above.

Process 800 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, the availability indication is transmitted via Layer1 signaling.

In a second aspect, alone or in combination with the first aspect, theavailability indication is associated with a paging signal.

In a third aspect, alone or in combination with one or more of the firstand second aspects, process 800 includes transmitting an indication ofthe one or more groups of TRS resources or the one or more groups of TRSresource sets.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, the indication of the one or more groups ofTRS resources or the one or more groups of TRS resource sets is includedin the configuration of the set of TRS resources or the set of TRSresource sets.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, the configuration indicates, for a TRS resourceor a TRS resource set, an identifier of a group associated with the TRSresource or the TRS resource set.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, process 800 includes transmitting one or moregroup configurations associated with the one or more groups of TRSresources or the one or more groups of TRS resource sets, wherein agroup configuration, of the one or more group configurations, indicatesidentifiers of one or more TRS resources or one or more TRS resourcesets included in a group associated with the group configuration.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, a quantity of TRS resources or TRS resourcesets to be included in each group, of the one or more groups of TRSresources or the one or more groups of TRS resource sets, is defined,and a group, of the one or more groups of TRS resources or the one ormore groups of TRS resource sets, is formed based at least in part onthe quantity and based at least in part on identifiers of the set of TRSresources or identifiers of the set of TRS resource sets.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, a first group includes a first subset ofTRS resources or TRS resource sets, from the set of TRS resources or theset of TRS resource sets, and a second group includes a second subset ofTRS resources or TRS resource sets from the set of TRS resources or theset of TRS resource sets, the first group and the second group bothinclude the quantity of the TRS resources or the TRS resource sets, andTRS resources or TRS resource sets included in the first group and thesecond group are based at least in part on an order of the identifiersof the set of TRS resources or an order of the identifiers of the set ofTRS resource sets.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, a group, of the one or more groups of TRSresources or the one or more groups of TRS resource sets, includes TRSresources or TRS resource sets that are associated with different QCLreferences.

In a tenth aspect, alone or in combination with one or more of the firstthrough ninth aspects, the availability indication includes anindication for each group of the one or more groups of TRS resources orthe one or more groups of TRS resource sets, and an indication, for agroup, indicates whether all TRS resources or all TRS resource setsincluded in the group are to be transmitted by the base station.

In an eleventh aspect, alone or in combination with one or more of thefirst through tenth aspects, the availability indication is associatedwith multiple signals, and each signal, of the multiple signals,indicates an availability associated with a group of the one or moregroups of TRS resources or the one or more groups of TRS resource sets.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, transmitting the availability indicationincludes transmitting a first availability indication associated with afirst group of the one or more groups of TRS resources or the one ormore groups of TRS resource sets, and transmitting a second availabilityindication associated with a second group of the one or more groups ofTRS resources or the one or more groups of TRS resource sets.

In a thirteenth aspect, alone or in combination with one or more of thefirst through twelfth aspects, the first availability indication istransmitted using a first set of time-frequency resources, and whereinthe second availability indication is received using a second set oftime-frequency resources.

In a fourteenth aspect, alone or in combination with one or more of thefirst through thirteenth aspects, the first availability indicationindicates whether TRS resources or TRS resource sets, included in thefirst group, are to be transmitted by the base station, and the secondavailability indication indicates whether TRS resources or TRS resourcesets, included in the second group, are to be transmitted by the basestation.

In a fifteenth aspect, alone or in combination with one or more of thefirst through fourteenth aspects, the first availability indicationincludes separate indications for each TRS resource or TRS resource setincluded in the first group, and the second availability indicationincludes separate indications for each TRS resource or TRS resource setincluded in the second group.

In a sixteenth aspect, alone or in combination with one or more of thefirst through fifteenth aspects, the first availability indication istransmitted during a first paging cycle, and the second availabilityindication is transmitted during a second paging cycle.

In a seventeenth aspect, alone or in combination with one or more of thefirst through sixteenth aspects, the first availability indication andthe second availability indication are associated with a same validityduration.

In an eighteenth aspect, alone or in combination with one or more of thefirst through seventeenth aspects, the same validity duration isassociated with a common start point and a common end point for both thefirst availability indication and the second availability indication.

In a nineteenth aspect, alone or in combination with one or more of thefirst through eighteenth aspects, the first availability indication isassociated with a first validity duration and the second availabilityindication is associated with a second validity duration.

In a twentieth aspect, alone or in combination with one or more of thefirst through nineteenth aspects, the first validity duration is basedat least in part on a first time at which the first availabilityindication is transmitted, and the second validity duration is based atleast in part on a second time at which the second availabilityindication is transmitted.

In a twenty-first aspect, alone or in combination with one or more ofthe first through twentieth aspects, the availability indicationindicates whether the subset of TRS resources or the subset of TRSresource sets from the set of TRS resource sets are to be transmitted bythe base station.

In a twenty-second aspect, alone or in combination with one or more ofthe first through twenty-first aspects, remaining TRS resources orremaining TRS resource sets are to be transmitted by the base station,and the remaining TRS resources or the remaining TRS resource sets areTRS resources or TRS resource sets, from the set of TRS resources or theset of TRS resource sets, that are not included in the subset of TRSresources or the subset of TRS resource sets.

In a twenty-third aspect, alone or in combination with one or more ofthe first through twenty-second aspects, remaining TRS resources orremaining TRS resource sets are not to be transmitted by the basestation, and the remaining TRS resources or the remaining TRS resourcesets are TRS resources or TRS resource sets, from the set of TRSresources or the set of TRS resource sets, that are not included in thesubset of TRS resources or the subset of TRS resource sets.

In a twenty-fourth aspect, alone or in combination with one or more ofthe first through twenty-third aspects, process 800 includestransmitting an indication of whether the UE is to identify that thebase station is to transmit or not transmit remaining TRS resources orremaining TRS resource sets, from the set of TRS resources or the set ofTRS resource sets, that are not included in the availability indication.

In a twenty-fifth aspect, alone or in combination with one or more ofthe first through twenty-fourth aspects, process 800 includestransmitting a TRS using a TRS resource, from the set of TRS resources,or a TRS resource set from the set of TRS resource sets, based at leastin part on transmitting the availability indication.

Although FIG. 8 shows example blocks of process 800, in some aspects,process 800 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 8 .Additionally, or alternatively, two or more of the blocks of process 800may be performed in parallel.

FIG. 9 is a diagram of an example apparatus 900 for wirelesscommunication. The apparatus 900 may be a UE, or a UE may include theapparatus 900. In some aspects, the apparatus 900 includes a receptioncomponent 902 and a transmission component 904, which may be incommunication with one another (for example, via one or more busesand/or one or more other components). As shown, the apparatus 900 maycommunicate with another apparatus 906 (such as a UE, a base station, oranother wireless communication device) using the reception component 902and the transmission component 904. As further shown, the apparatus 900may include the communication manager 140. The communication manager 140may include a TRS availability identification component 908, among otherexamples.

In some aspects, the apparatus 900 may be configured to perform one ormore operations described herein in connection with FIGS. 5 and 6 .Additionally, or alternatively, the apparatus 900 may be configured toperform one or more processes described herein, such as process 700 ofFIG. 7 , or a combination thereof. In some aspects, the apparatus 900and/or one or more components shown in FIG. 9 may include one or morecomponents of the UE described in connection with FIG. 2 . Additionally,or alternatively, one or more components shown in FIG. 9 may beimplemented within one or more components described in connection withFIG. 2 . Additionally, or alternatively, one or more components of theset of components may be implemented at least in part as software storedin a memory. For example, a component (or a portion of a component) maybe implemented as instructions or code stored in a non-transitorycomputer-readable medium and executable by a controller or a processorto perform the functions or operations of the component.

The reception component 902 may receive communications, such asreference signals, control information, data communications, or acombination thereof, from the apparatus 906. The reception component 902may provide received communications to one or more other components ofthe apparatus 900. In some aspects, the reception component 902 mayperform signal processing on the received communications (such asfiltering, amplification, demodulation, analog-to-digital conversion,demultiplexing, deinterleaving, de-mapping, equalization, interferencecancellation, or decoding, among other examples), and may provide theprocessed signals to the one or more other components of the apparatus900. In some aspects, the reception component 902 may include one ormore antennas, a modem, a demodulator, a MIMO detector, a receiveprocessor, a controller/processor, a memory, or a combination thereof,of the UE described in connection with FIG. 2 .

The transmission component 904 may transmit communications, such asreference signals, control information, data communications, or acombination thereof, to the apparatus 906. In some aspects, one or moreother components of the apparatus 900 may generate communications andmay provide the generated communications to the transmission component904 for transmission to the apparatus 906. In some aspects, thetransmission component 904 may perform signal processing on thegenerated communications (such as filtering, amplification, modulation,digital-to-analog conversion, multiplexing, interleaving, mapping, orencoding, among other examples), and may transmit the processed signalsto the apparatus 906. In some aspects, the transmission component 904may include one or more antennas, a modem, a modulator, a transmit MIMOprocessor, a transmit processor, a controller/processor, a memory, or acombination thereof, of the UE described in connection with FIG. 2 . Insome aspects, the transmission component 904 may be co-located with thereception component 902 in a transceiver.

The reception component 902 may receive configurations of a set of TRSresources or a set of TRS resource sets. The reception component 902 mayreceive, from the base station, an availability indication associatedwith one or more TRS resources or one or more TRS resource sets from theset of TRS resources or the set of TRS resource sets, wherein theavailability indication indicates whether TRS resources or TRS resourcesets included in the one or more TRS resources or the one or more TRSresource sets are to be transmitted by the base station, and wherein theavailability indication is associated with at least one of: one or moregroups of TRS resources, associated with the set of TRS resources, orone or more groups of TRS resource sets associated with the set of TRSresource sets; or a subset of TRS resources, from the set of TRSresources, or a subset of TRS resource sets from the set of TRS resourcesets.

The TRS availability identification component 908 may identify availableTRS resources, from the set of TRS resources, or available TRS resourcesets, from the set of TRS resource sets, based at least in part on theavailability indication.

The reception component 902 may receive, from the base station, anindication of the one or more groups of TRS resources or the one or moregroups of TRS resource sets.

The reception component 902 may receive, from the base station, one ormore group configurations associated with the one or more groups of TRSresources or the one or more groups of TRS resource sets, wherein agroup configuration, of the one or more group configurations, indicatesidentifiers of one or more TRS resources or one or more TRS resourcesets included in a group associated with the group configuration.

The reception component 902 may receive, from the base station, anindication of whether the UE is to identify that the base station is totransmit or not transmit remaining TRS resources or remaining TRSresource sets, from the set of TRS resources or the set of TRS resourcesets, that are not included in the availability indication.

The reception component 902 may receive, from the base station, a TRSusing a TRS resource, from the set of TRS resources, or a TRS resourceset from the set of TRS resource sets, based at least in part on theavailability indication.

The number and arrangement of components shown in FIG. 9 are provided asan example. In practice, there may be additional components, fewercomponents, different components, or differently arranged componentsthan those shown in FIG. 9 . Furthermore, two or more components shownin FIG. 9 may be implemented within a single component, or a singlecomponent shown in FIG. 9 may be implemented as multiple, distributedcomponents. Additionally, or alternatively, a set of (one or more)components shown in FIG. 9 may perform one or more functions describedas being performed by another set of components shown in FIG. 9 .

FIG. 10 is a diagram of an example apparatus 1000 for wirelesscommunication. The apparatus 1000 may be a base station, or a basestation may include the apparatus 1000. In some aspects, the apparatus1000 includes a reception component 1002 and a transmission component1004, which may be in communication with one another (for example, viaone or more buses and/or one or more other components). As shown, theapparatus 1000 may communicate with another apparatus 1006 (such as aUE, a base station, or another wireless communication device) using thereception component 1002 and the transmission component 1004. As furthershown, the apparatus 1000 may include the communication manager 150. Thecommunication manager 150 may include a TRS availability determinationcomponent 1008, among other examples.

In some aspects, the apparatus 1000 may be configured to perform one ormore operations described herein in connection with FIGS. 5 and 6 .Additionally, or alternatively, the apparatus 1000 may be configured toperform one or more processes described herein, such as process 800 ofFIG. 8 , or a combination thereof. In some aspects, the apparatus 1000and/or one or more components shown in FIG. 10 may include one or morecomponents of the base station described in connection with FIG. 2 .Additionally, or alternatively, one or more components shown in FIG. 10may be implemented within one or more components described in connectionwith FIG. 2 . Additionally, or alternatively, one or more components ofthe set of components may be implemented at least in part as softwarestored in a memory. For example, a component (or a portion of acomponent) may be implemented as instructions or code stored in anon-transitory computer-readable medium and executable by a controlleror a processor to perform the functions or operations of the component.

The reception component 1002 may receive communications, such asreference signals, control information, data communications, or acombination thereof, from the apparatus 1006. The reception component1002 may provide received communications to one or more other componentsof the apparatus 1000. In some aspects, the reception component 1002 mayperform signal processing on the received communications (such asfiltering, amplification, demodulation, analog-to-digital conversion,demultiplexing, deinterleaving, de-mapping, equalization, interferencecancellation, or decoding, among other examples), and may provide theprocessed signals to the one or more other components of the apparatus1000. In some aspects, the reception component 1002 may include one ormore antennas, a modem, a demodulator, a MIMO detector, a receiveprocessor, a controller/processor, a memory, or a combination thereof,of the base station described in connection with FIG. 2 .

The transmission component 1004 may transmit communications, such asreference signals, control information, data communications, or acombination thereof, to the apparatus 1006. In some aspects, one or moreother components of the apparatus 1000 may generate communications andmay provide the generated communications to the transmission component1004 for transmission to the apparatus 1006. In some aspects, thetransmission component 1004 may perform signal processing on thegenerated communications (such as filtering, amplification, modulation,digital-to-analog conversion, multiplexing, interleaving, mapping, orencoding, among other examples), and may transmit the processed signalsto the apparatus 1006. In some aspects, the transmission component 1004may include one or more antennas, a modem, a modulator, a transmit MIMOprocessor, a transmit processor, a controller/processor, a memory, or acombination thereof, of the base station described in connection withFIG. 2 . In some aspects, the transmission component 1004 may beco-located with the reception component 1002 in a transceiver.

The transmission component 1004 may transmit configurations of a set ofTRS resources or a set of TRS resource sets. The transmission component1004 may transmit an availability indication associated with one or moreTRS resources or one or more TRS resource sets from the set of TRSresources or the set of TRS resource sets, wherein the availabilityindication indicates whether TRS resources or TRS resource sets includedin the one or more TRS resources or the one or more TRS resource setsare to be transmitted by the apparatus 1000, and wherein theavailability indication is associated with at least one of: one or moregroups of TRS resources, associated with the set of TRS resources, orone or more groups of TRS resource sets associated with the set of TRSresource sets; or a subset of TRS resources, from the set of TRSresources, or a subset of TRS resource sets from the set of TRS resourcesets.

The TRS availability determination component 1008 may determineavailable TRS resources, from the set of TRS resources, or available TRSresource sets, from the set of TRS resource sets, that are to betransmitted by the apparatus 1000. The transmission component 1004 maytransmit the availability indication indicating the available TRSresources or the available TRS resource sets.

The transmission component 1004 may transmit an indication of the one ormore groups of TRS resources or the one or more groups of TRS resourcesets.

The transmission component 1004 may transmit one or more groupconfigurations associated with the one or more groups of TRS resourcesor the one or more groups of TRS resource sets, wherein a groupconfiguration, of the one or more group configurations, indicatesidentifiers of one or more TRS resources or one or more TRS resourcesets included in a group associated with the group configuration.

The transmission component 1004 may transmit an indication of whetherthe UE is to identify that the base station is to transmit or nottransmit remaining TRS resources or remaining TRS resource sets, fromthe set of TRS resources or the set of TRS resource sets, that are notincluded in the availability indication.

The transmission component 1004 may transmit a TRS using a TRS resource,from the set of TRS resources, or a TRS resource set from the set of TRSresource sets, based at least in part on transmitting the availabilityindication.

The number and arrangement of components shown in FIG. 10 are providedas an example. In practice, there may be additional components, fewercomponents, different components, or differently arranged componentsthan those shown in FIG. 10 . Furthermore, two or more components shownin FIG. 10 may be implemented within a single component, or a singlecomponent shown in FIG. 10 may be implemented as multiple, distributedcomponents. Additionally, or alternatively, a set of (one or more)components shown in FIG. 10 may perform one or more functions describedas being performed by another set of components shown in FIG. 10 .

The following provides an overview of some Aspects of the presentdisclosure:

Aspect 1: A method of wireless communication performed by a userequipment (UE), comprising: receiving configurations of a set oftracking reference signal (TRS) resources or a set of TRS resource sets;and receiving an availability indication associated with one or more TRSresources or one or more TRS resource sets from the set of TRS resourcesor the set of TRS resource sets, wherein the availability indicationindicates whether TRS resources or TRS resource sets included in the oneor more TRS resources or the one or more TRS resource sets are to betransmitted by the base station, and wherein the availability indicationis associated with at least one of: one or more groups of TRS resources,associated with the set of TRS resources, or one or more groups of TRSresource sets associated with the set of TRS resource sets; or a subsetof TRS resources, from the set of TRS resources, or a subset of TRSresource sets from the set of TRS resource sets.

Aspect 2: The method of Aspect 1, wherein the availability indication isreceived via Layer 1 signaling.

Aspect 3: The method of any of Aspects 1-2, wherein the availabilityindication is associated with a paging signal.

Aspect 4: The method of any of Aspects 1-3, further comprising:receiving, from the base station, an indication of the one or moregroups of TRS resources or the one or more groups of TRS resource sets.

Aspect 5: The method of Aspect 4, wherein the indication of the one ormore groups of TRS resources or the one or more groups of TRS resourcesets is included in the configuration of the set of TRS resources or theset of TRS resource sets.

Aspect 6: The method of any of Aspects 1-5, wherein the configurationindicates, for a TRS resource or a TRS resource set, an identifier of agroup associated with the TRS resource or the TRS resource set.

Aspect 7: The method of any of Aspects 1-6, further comprising:receiving, from the base station, one or more group configurationsassociated with the one or more groups of TRS resources or the one ormore groups of TRS resource sets, wherein a group configuration, of theone or more group configurations, indicates identifiers of one or moreTRS resources or one or more TRS resource sets included in a groupassociated with the group configuration.

Aspect 8: The method of any of Aspects 1-7, wherein a quantity of TRSresources or TRS resource sets to be included in each group, of the oneor more groups of TRS resources or the one or more groups of TRSresource sets, is defined, and wherein a group, of the one or moregroups of TRS resources or the one or more groups of TRS resource sets,is formed based at least in part on the quantity and based at least inpart on identifiers of the set of TRS resources or identifiers of theset of TRS resource sets.

Aspect 9: The method of Aspect 8, wherein a first group includes a firstsubset of TRS resources or TRS resource sets, from the set of TRSresources or the set of TRS resource sets, and a second group includes asecond subset of TRS resources or TRS resource sets from the set of TRSresources or the set of TRS resource sets, wherein the first group andthe second group both include the quantity of the TRS resources or theTRS resource sets, and wherein TRS resources or TRS resource setsincluded in the first group and the second group are based at least inpart on an order of the identifiers of the set of TRS resources or anorder of the identifiers of the set of TRS resource sets.

Aspect 10: The method of any of Aspects 1-9, wherein a group, of the oneor more groups of TRS resources or the one or more groups of TRSresource sets, includes TRS resources or TRS resource sets that areassociated with different quasi co-location (QCL) references.

Aspect 11: The method of any of Aspects 1-10, wherein the availabilityindication includes an indication for each group of the one or moregroups of TRS resources or the one or more groups of TRS resource sets,and wherein an indication, for a group, indicates whether all TRSresources or all TRS resource sets included in the group are to betransmitted by the base station.

Aspect 12: The method of any of Aspects 1-11, wherein the availabilityindication is associated with multiple signals, and wherein each signal,of the multiple signals, indicates an availability associated with agroup of the one or more groups of TRS resources or the one or moregroups of TRS resource sets.

Aspect 13: The method of any of Aspects 1-12, wherein receiving theavailability indication comprises: receiving, from the base station, afirst availability indication associated with a first group of the oneor more groups of TRS resources or the one or more groups of TRSresource sets; and receiving, from the base station, a secondavailability indication associated with a second group of the one ormore groups of TRS resources or the one or more groups of TRS resourcesets.

Aspect 14: The method of Aspect 13, wherein the first availabilityindication is received using a first set of time-frequency resources,and wherein the second availability indication is received using asecond set of time-frequency resources.

Aspect 15: The method of any of Aspects 13-14, wherein the firstavailability indication indicates whether TRS resources or TRS resourcesets, included in the first group, are to be transmitted by the basestation; and wherein the second availability indication indicateswhether TRS resources or TRS resource sets, included in the secondgroup, are to be transmitted by the base station.

Aspect 16: The method of any of Aspects 13-15, wherein the firstavailability indication includes separate indications for each TRSresource or TRS resource set included in the first group; and whereinthe second availability indication includes separate indications foreach TRS resource or TRS resource set included in the second group.

Aspect 17: The method of any of Aspects 13-16, wherein the firstavailability indication is received during a first paging cycle, andwherein the second availability indication is received during a secondpaging cycle.

Aspect 18: The method of any of Aspects 13-17, wherein the firstavailability indication and the second availability indication areassociated with a same validity duration.

Aspect 19: The method of Aspect 18, wherein the same validity durationis associated with a common start point and a common end point for boththe first availability indication and the second availabilityindication.

Aspect 20: The method of any of Aspects 13-19, wherein the firstavailability indication is associated with a first validity duration andthe second availability indication is associated with a second validityduration.

Aspect 21: The method of Aspect 20, wherein the first validity durationis based at least in part on a first time at which the firstavailability indication is received, and wherein the second validityduration is based at least in part on a second time at which the secondavailability indication is received.

Aspect 22: The method of any of Aspects 1-21, wherein the availabilityindication indicates whether the subset of TRS resources or the subsetof TRS resource sets from the set of TRS resource sets are to betransmitted by the base station.

Aspect 23: The method of Aspect 22, wherein remaining TRS resources orremaining TRS resource sets are to be transmitted by the base station,wherein the remaining TRS resources or the remaining TRS resource setsare TRS resources or TRS resource sets, from the set of TRS resources orthe set of TRS resource sets, that are not included in the subset of TRSresources or the subset of TRS resource sets.

Aspect 24: The method of any of Aspects 22-23, wherein remaining TRSresources or remaining TRS resource sets are not to be transmitted bythe base station, wherein the remaining TRS resources or the remainingTRS resource sets are TRS resources or TRS resource sets, from the setof TRS resources or the set of TRS resource sets, that are not includedin the subset of TRS resources or the subset of TRS resource sets.

Aspect 25: The method of any of Aspects 22-24, further comprising:receiving, from the base station, an indication of whether the UE is toidentify that the base station is to transmit or not transmit remainingTRS resources or remaining TRS resource sets, from the set of TRSresources or the set of TRS resource sets, that are not included in theavailability indication.

Aspect 26: The method of any of Aspects 1-25, further comprising:receiving, from the base station, a TRS using a TRS resource, from theset of TRS resources, or a TRS resource set from the set of TRS resourcesets, based at least in part on the availability indication.

Aspect 27: A method of wireless communication performed by a basestation, comprising: transmitting, to one or more user equipment (UEs),configurations of a set of tracking reference signal (TRS) resources ora set of TRS resource sets; and transmitting an availability indicationassociated with one or more TRS resources or one or more TRS resourcesets from the set of TRS resources or the set of TRS resource sets,wherein the availability indication indicates whether TRS resources orTRS resource sets included in the one or more TRS resources or the oneor more TRS resource sets are to be transmitted by the base station, andwherein the availability indication is associated with at least one of:one or more groups of TRS resources, associated with the set of TRSresources, or one or more groups of TRS resource sets associated withthe set of TRS resource sets; or a subset of TRS resources, from the setof TRS resources, or a subset of TRS resource sets from the set of TRSresource sets.

Aspect 28: The method of Aspect 27, wherein the availability indicationis transmitted via Layer 1 signaling.

Aspect 29: The method of any of Aspects 27-28, wherein the availabilityindication is associated with a paging signal.

Aspect 30: The method of any of Aspects 27-29, further comprising:transmitting an indication of the one or more groups of TRS resources orthe one or more groups of TRS resource sets.

Aspect 31: The method of Aspect 30, wherein the indication of the one ormore groups of TRS resources or the one or more groups of TRS resourcesets is included in the configuration of the set of TRS resources or theset of TRS resource sets.

Aspect 32: The method of any of Aspects 27-31, wherein the configurationindicates, for a TRS resource or a TRS resource set, an identifier of agroup associated with the TRS resource or the TRS resource set.

Aspect 33: The method of any of Aspects 27-32, further comprising:transmitting one or more group configurations associated with the one ormore groups of TRS resources or the one or more groups of TRS resourcesets, wherein a group configuration, of the one or more groupconfigurations, indicates identifiers of one or more TRS resources orone or more TRS resource sets included in a group associated with thegroup configuration.

Aspect 34: The method of any of Aspects 27-33, wherein a quantity of TRSresources or TRS resource sets to be included in each group, of the oneor more groups of TRS resources or the one or more groups of TRSresource sets, is defined, and wherein a group, of the one or moregroups of TRS resources or the one or more groups of TRS resource sets,is formed based at least in part on the quantity and based at least inpart on identifiers of the set of TRS resources or identifiers of theset of TRS resource sets.

Aspect 35: The method of Aspect 34, wherein a first group includes afirst subset of TRS resources or TRS resource sets, from the set of TRSresources or the set of TRS resource sets, and a second group includes asecond subset of TRS resources or TRS resource sets from the set of TRSresources or the set of TRS resource sets, wherein the first group andthe second group both include the quantity of the TRS resources or theTRS resource sets, and wherein TRS resources or TRS resource setsincluded in the first group and the second group are based at least inpart on an order of the identifiers of the set of TRS resources or anorder of the identifiers of the set of TRS resource sets.

Aspect 36: The method of any of Aspects 27-35, wherein a group, of theone or more groups of TRS resources or the one or more groups of TRSresource sets, includes TRS resources or TRS resource sets that areassociated with different quasi co-location (QCL) references.

Aspect 37: The method of any of Aspects 27-36, wherein the availabilityindication includes an indication for each group of the one or moregroups of TRS resources or the one or more groups of TRS resource sets,and wherein an indication, for a group, indicates whether all TRSresources or all TRS resource sets included in the group are to betransmitted by the base station.

Aspect 38: The method of any of Aspects 27-37, wherein the availabilityindication is associated with multiple signals, and wherein each signal,of the multiple signals, indicates an availability associated with agroup of the one or more groups of TRS resources or the one or moregroups of TRS resource sets.

Aspect 39: The method of any of Aspects 27-38, wherein transmitting theavailability indication comprises: transmitting a first availabilityindication associated with a first group of the one or more groups ofTRS resources or the one or more groups of TRS resource sets; andtransmitting a second availability indication associated with a secondgroup of the one or more groups of TRS resources or the one or moregroups of TRS resource sets.

Aspect 40: The method of Aspect 39, wherein the first availabilityindication is transmitted using a first set of time-frequency resources,and wherein the second availability indication is received using asecond set of time-frequency resources.

Aspect 41: The method of any of Aspects 39-40, wherein the firstavailability indication indicates whether TRS resources or TRS resourcesets, included in the first group, are to be transmitted by the basestation; and wherein the second availability indication indicateswhether TRS resources or TRS resource sets, included in the secondgroup, are to be transmitted by the base station.

Aspect 42: The method of any of Aspects 39-41, wherein the firstavailability indication includes separate indications for each TRSresource or TRS resource set included in the first group; and whereinthe second availability indication includes separate indications foreach TRS resource or TRS resource set included in the second group.

Aspect 43: The method of any of Aspects 39-42, wherein the firstavailability indication is transmitted during a first paging cycle, andwherein the second availability indication is transmitted during asecond paging cycle.

Aspect 44: The method of any of Aspects 39-43, wherein the firstavailability indication and the second availability indication areassociated with a same validity duration.

Aspect 45: The method of Aspect 44, wherein the same validity durationis associated with a common start point and a common end point for boththe first availability indication and the second availabilityindication.

Aspect 46: The method of any of Aspects 39-45, wherein the firstavailability indication is associated with a first validity duration andthe second availability indication is associated with a second validityduration.

Aspect 47: The method of Aspect 46, wherein the first validity durationis based at least in part on a first time at which the firstavailability indication is transmitted, and wherein the second validityduration is based at least in part on a second time at which the secondavailability indication is transmitted.

Aspect 48: The method of any of Aspects 27-47, wherein the availabilityindication indicates whether the subset of TRS resources or the subsetof TRS resource sets from the set of TRS resource sets are to betransmitted by the base station.

Aspect 49: The method of Aspect 48, wherein remaining TRS resources orremaining TRS resource sets are to be transmitted by the base station,wherein the remaining TRS resources or the remaining TRS resource setsare TRS resources or TRS resource sets, from the set of TRS resources orthe set of TRS resource sets, that are not included in the subset of TRSresources or the subset of TRS resource sets.

Aspect 50: The method of any of Aspects 48-49, wherein remaining TRSresources or remaining TRS resource sets are not to be transmitted bythe base station, wherein the remaining TRS resources or the remainingTRS resource sets are TRS resources or TRS resource sets, from the setof TRS resources or the set of TRS resource sets, that are not includedin the subset of TRS resources or the subset of TRS resource sets.

Aspect 51: The method of any of Aspects 48-50, further comprising:transmitting an indication of whether the UE is to identify that thebase station is to transmit or not transmit remaining TRS resources orremaining TRS resource sets, from the set of TRS resources or the set ofTRS resource sets, that are not included in the availability indication.

Aspect 52: The method of any of Aspects 27-51, further comprising:transmitting a TRS using a TRS resource, from the set of TRS resources,or a TRS resource set from the set of TRS resource sets, based at leastin part on transmitting the availability indication.

Aspect 53: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more of Aspects1-26.

Aspect 54: A device for wireless communication, comprising a memory andone or more processors coupled to the memory, the one or more processorsconfigured to perform the method of one or more of Aspects 1-26.

Aspect 55: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more of Aspects 1-26.

Aspect 56: A non-transitory computer-readable medium storing code forwireless communication, the code comprising instructions executable by aprocessor to perform the method of one or more of Aspects 1-26.

Aspect 57: A non-transitory computer-readable medium storing a set ofinstructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore of Aspects 1-26.

Aspect 58: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more of Aspects27-52.

Aspect 59: A device for wireless communication, comprising a memory andone or more processors coupled to the memory, the one or more processorsconfigured to perform the method of one or more of Aspects 27-52.

Aspect 60: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more of Aspects 27-52.

Aspect 61: A non-transitory computer-readable medium storing code forwireless communication, the code comprising instructions executable by aprocessor to perform the method of one or more of Aspects 27-52.

Aspect 62: A non-transitory computer-readable medium storing a set ofinstructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore of Aspects 27-52.

The foregoing disclosure provides illustration and description but isnot intended to be exhaustive or to limit the aspects to the preciseforms disclosed. Modifications and variations may be made in light ofthe above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construedas hardware and/or a combination of hardware and software. “Software”shall be construed broadly to mean instructions, instruction sets, code,code segments, program code, programs, subprograms, software modules,applications, software applications, software packages, routines,subroutines, objects, executables, threads of execution, procedures,and/or functions, among other examples, whether referred to as software,firmware, middleware, microcode, hardware description language, orotherwise. As used herein, a “processor” is implemented in hardwareand/or a combination of hardware and software. It will be apparent thatsystems and/or methods described herein may be implemented in differentforms of hardware and/or a combination of hardware and software. Theactual specialized control hardware or software code used to implementthese systems and/or methods is not limiting of the aspects. Thus, theoperation and behavior of the systems and/or methods are describedherein without reference to specific software code, since those skilledin the art will understand that software and hardware can be designed toimplement the systems and/or methods based, at least in part, on thedescription herein.

As used herein, “satisfying a threshold” may, depending on the context,refer to a value being greater than the threshold, greater than or equalto the threshold, less than the threshold, less than or equal to thethreshold, equal to the threshold, not equal to the threshold, or thelike.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of various aspects. Many of thesefeatures may be combined in ways not specifically recited in the claimsand/or disclosed in the specification. The disclosure of various aspectsincludes each dependent claim in combination with every other claim inthe claim set. As used herein, a phrase referring to “at least one of” alist of items refers to any combination of those items, including singlemembers. As an example, “at least one of: a, b, or c” is intended tocover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination withmultiples of the same element (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b,a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b,and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems and may be used interchangeably with “one or more.” Further, asused herein, the article “the” is intended to include one or more itemsreferenced in connection with the article “the” and may be usedinterchangeably with “the one or more.” Furthermore, as used herein, theterms “set” and “group” are intended to include one or more items andmay be used interchangeably with “one or more.” Where only one item isintended, the phrase “only one” or similar language is used. Also, asused herein, the terms “has,” “have,” “having,” or the like are intendedto be open-ended terms that do not limit an element that they modify(e.g., an element “having” A may also have B). Further, the phrase“based on” is intended to mean “based, at least in part, on” unlessexplicitly stated otherwise. Also, as used herein, the term “or” isintended to be inclusive when used in a series and may be usedinterchangeably with “and/or,” unless explicitly stated otherwise (e.g.,if used in combination with “either” or “only one of”).

What is claimed is:
 1. A user equipment (UE) for wireless communication,comprising: a memory; and one or more processors, coupled to the memory,configured to: receive configurations of a set of tracking referencesignal (TRS) resource sets; receive an availability indicationassociated with one or more TRS resource sets from the set of TRSresource sets, wherein: the availability indication includes anindication for each group of one or more groups of TRS resource sets,and an indication, for a group, indicates whether all TRS resource setsincluded in the group are to be transmitted; and communicate with anetwork entity based at least in part on receiving the availabilityindication.
 2. The UE of claim 1, wherein the availability indication isreceived via Layer 1 signaling.
 3. The UE of claim 1, wherein theavailability indication is associated with a paging signal.
 4. The UE ofclaim 1, wherein the configuration indicates, for a TRS resource set, anidentifier of a group associated with the TRS resource set.
 5. The UE ofclaim 1, wherein the one or more processors are further configured to:receive an indication of the one or more groups of TRS resource sets. 6.The UE of claim 5, wherein the indication of the one or more groups ofTRS resource sets is included in the configuration of the set of TRSresource sets.
 7. The UE of claim 1, wherein a quantity of TRS resourcesets to be included in each group, of the one or more groups of TRSresource sets, is defined, and wherein a group, of the one or moregroups of TRS resource sets, is formed based at least in part on thequantity and based at least in part on identifiers of the set of TRSresource sets.
 8. The UE of claim 7, wherein a first group includes afirst subset of TRS resource sets, from the set of TRS resource sets,and a second group includes a second subset of TRS resource sets fromthe set of TRS resource sets, wherein the first group and the secondgroup both include the quantity of the TRS resource sets, and whereinTRS resource sets included in the first group and the second group arebased at least in part on an order of the identifiers of the set of TRSresource sets.
 9. The UE of claim 1, wherein the availability indicationis associated with multiple signals, and wherein each signal, of themultiple signals, indicates an availability associated with a group ofthe one or more groups of TRS resource sets.
 10. A network entity forwireless communication, comprising: a memory; and one or moreprocessors, coupled to the memory, configured to: transmitconfigurations of a set of tracking reference signal (TRS) resource setsintended for one or more user equipment (UEs); and transmit anavailability indication associated with one or more TRS resource setsfrom the set of TRS resource sets, wherein: the availability indicationincludes an indication for each group of one or more groups of TRSresource sets, and an indication, for a group, indicates whether all TRSresource sets included in the group are to be transmitted.
 11. Thenetwork entity of claim 10, wherein the configuration indicates, for aTRS resource set, an identifier of a group associated with the TRSresource set.
 12. A method of wireless communication performed by a userequipment (UE), comprising: receiving configurations of a set oftracking reference signal (TRS) resource sets; receiving an availabilityindication associated with one or more TRS resource sets from the set ofTRS resource sets, wherein: the availability indication includes anindication for each group of one or more groups of TRS resource sets,and an indication, for a group, indicates whether all TRS resource setsincluded in the group are to be transmitted; and communicating with anetwork entity based at least in part on receiving the availabilityindication.
 13. The method of claim 12, wherein the availabilityindication is received via Layer 1 signaling.
 14. The method of claim12, wherein the availability indication is associated with a pagingsignal.
 15. The method of claim 12, wherein the configuration indicates,for a TRS resource set, an identifier of a group associated with the TRSresource set.
 16. The method of claim 12, further comprising: receivingan indication of the one or more groups of TRS resource sets.
 17. Themethod of claim 16, wherein the indication of the one or more groups ofTRS resource sets is included in the configuration of the set of TRSresource sets.
 18. The method of claim 12, wherein a quantity of TRSresource sets to be included in each group, of the one or more groups ofTRS resource sets, is defined, and wherein a group, of the one or moregroups of TRS resource sets, is formed based at least in part on thequantity and based at least in part on identifiers of the set of TRSresource sets.
 19. The method of claim 18, wherein a first groupincludes a first subset of TRS resource sets, from the set of TRSresource sets, and a second group includes a second subset of TRSresource sets from the set of TRS resource sets, wherein the first groupand the second group both include the quantity of the TRS resource sets,and wherein TRS resource sets included in the first group and the secondgroup are based at least in part on an order of the identifiers of theset of TRS resource sets.
 20. The method of claim 12, wherein theavailability indication is associated with multiple signals, and whereineach signal, of the multiple signals, indicates an availabilityassociated with a group of the one or more groups of TRS resource sets.